1
|
Assembly of fluorinated chromanones via enantioselective tandem reaction. Chem Commun (Camb) 2021; 57:4722-4725. [PMID: 33977956 DOI: 10.1039/d1cc01187a] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The enantioselective synthesis of fluorinated tricyclic chromanones with multiple vicinal stereogenic centers has been realized for the first time, through the tandem reaction between 2-fluorinated 1-(2-hydroxyaryl)-1,3-diketones and α,β-unsaturated aldehydes. In the presence of chiral amine, the organo-tandem reaction including catalytic Michael addition/cycloketalization/hemiacetalization and acylation sequence provided a wide range of fluorinated tricyclic chromanones with excellent outcomes (>30 examples, up to >99% ee and >19 : 1 d.r.). A plausible catalytic cycle and transition state are also provided for this tandem reaction to rationalize the observed sense of asymmetric induction.
Collapse
|
2
|
|
3
|
Diastereo- and Enantioselective Synthesis of Fluorine Motifs with Two Contiguous Stereogenic Centers. J Am Chem Soc 2018; 140:13878-13883. [DOI: 10.1021/jacs.8b08778] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
4
|
One-pot Fluorination and Organocatalytic Robinson Annulation for Asymmetric Synthesis of Mono- and Difluorinated Cyclohexenones. Molecules 2018; 23:molecules23092251. [PMID: 30181479 PMCID: PMC6225330 DOI: 10.3390/molecules23092251] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2018] [Revised: 08/29/2018] [Accepted: 08/31/2018] [Indexed: 11/17/2022] Open
Abstract
A one-pot fluorination and organocatalytic Robinson annulation sequence has been developed for asymmetric synthesis of 6-fluoroyclohex-2-en-1-ones and 4,6-difluorocyclohex-2-en-1-ones. The reactions promoted by cinchona alkaloid amine afforded products bearing two or three stereocenters in good to excellent yields with up to 99% ee and 20:1 dr.
Collapse
|
5
|
A diastereoselective Mannich-type reaction of α-fluorinated carboxylate esters: synthesis of β-amino acids containing α-quaternary fluorinated carbon centers. Org Biomol Chem 2018; 14:6457-62. [PMID: 27279124 DOI: 10.1039/c6ob01084a] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We report a diastereoselective Mannich-type reaction of α-alkyl, α-aryl, and α-vinyl fluoroacetates with N-tert-butylsulfinyl imines. This method provides a powerful means to access a broad range of highly functionalized β-amino acids containing α-fluorinated quaternary stereogenic carbon centers. We also show that the stereochemical outcome of the present reaction is highly dependent on the steric and electronic properties of the fluorocarbon nucleophiles. This protocol uses readily available starting materials, tolerates a variety of functional groups, and is operationally simple.
Collapse
|
6
|
Finding Lead Catalytic Systems for a Rare Version of Enantioselective Robinson Annulation: Integration of Fluorogenic Assays in Catalyst Screening. ACS OMEGA 2017; 2:7253-7266. [PMID: 31457301 PMCID: PMC6645050 DOI: 10.1021/acsomega.7b01103] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/31/2017] [Accepted: 09/22/2017] [Indexed: 06/10/2023]
Abstract
Among the several variants of the highly useful and versatile Robinson annulation, a particular variation that involves ketones reacting with nonenolizable enones, while the α-carbons of the ketones act as nucleophiles at both steps of this cascade process, remains largely unexplored. Moreover, such a catalytic enantioselective reaction is exceptionally rare. While pursuing catalysis of this transformation, we developed two fluorogenic assays that, in combination with other analytic techniques, enabled rapid screening of several sets of catalysts. The first set of polymer-bound aminourea bifunctional organocatalysts was screened using a two-step fluorogenic protocol, designed for slower (e.g., heterogeneous) catalysts. Robinson annulation of acetone with 4'-nitrochalcone formed 3-(4-nitrophenyl)-5-phenyl-2-cyclohexenone, which, after a "developing" reductive treatment, was converted into the corresponding amino derivative, serving as a fluorescent reporter. On the other hand, a range of potentially faster homogeneous catalyst-cocatalyst systems were examined using a direct assay, where 4'-dimethylaminochalcone is converted into the corresponding cyclohexanone fluorescent reporter already upon annulation with acetone. In both cases, the combination of the fluorogenic protocols with high-performance liquid chromatography-based enantiomeric excess estimation enabled identification of lead catalysts, which promoted the enantioselective version of this variant of the annulation.
Collapse
|
7
|
Enantioselective Access to Robinson Annulation Products and Michael Adducts as Precursors. Angew Chem Int Ed Engl 2017; 56:12424-12458. [PMID: 28436571 DOI: 10.1002/anie.201701401] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2017] [Indexed: 12/26/2022]
Abstract
The Robinson annulation is a reaction that has been useful for numerous syntheses since its discovery in 1935, especially in the field of steroid synthesis. The products are usually obtained after three consecutive steps: the formation of an enolate (or derivative), a conjugate addition, and an aldol reaction. Over the years, several methodological improvements have been made for each individual step or alternative routes have been devised to access the Robinson annulation products. The first part of this Review outlines the most relevant developments towards the formation of monocarbonyl-derived Robinson annulation products (MRA products, MRAPs) and activated monocarbonyl-derived Robinson annulation products (AMRA products, AMRAPs). The following sections are then devoted to the diastereoselective and enantioselective synthesis of these products, while the last section describes the enantiomeric resolution of racemic mixtures.
Collapse
|
8
|
Enantioselektive Synthese von Robinson‐Anellierungsprodukten und Michael‐Addukten als Vorstufen. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201701401] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
|
9
|
Stereoselective Mannich Reaction of N
-(tert
-Butylsulfinyl)imines with 3-Fluorooxindoles and Fluoroacetamides. Adv Synth Catal 2017. [DOI: 10.1002/adsc.201700353] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
|
10
|
Recyclable Organocatalysts for a One-Pot Asymmetric Synthesis of 2-Fluorocyclohexanols Bearing Six Contiguous Stereocenters. Adv Synth Catal 2017. [DOI: 10.1002/adsc.201700129] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
|
11
|
Diastereoselective Mannich Reactions Using Fluorinated Ketones: Synthesis of Stereogenic Carbon-Fluorine Units. J Org Chem 2016; 81:9858-9866. [PMID: 27704830 DOI: 10.1021/acs.joc.6b01979] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
A diastereoselective Mannich reaction of simple α-fluoro ketones with N-tert-butylsulfinylimines was developed. This method provides a concise route to a variety of structurally diverse α-fluoro-β-amino ketones containing fluorinated stereogenic carbon centers; good yields and high diastereoselectivities were achieved. This method uses readily accessible starting materials and has a broad substrate scope: cyclic and linear α-fluoro ketones and fluoromethyl ketones are all suitable substrates.
Collapse
|
12
|
Undecorated Cu(OAc)2-Catalyzed C(sp3)-C(sp3) Bond Formation throughpara-Hydroxy Group Triggered Remote Benzylic C(sp3)-H Bond Functionalization. European J Org Chem 2015. [DOI: 10.1002/ejoc.201500706] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
|
13
|
Primary-secondary diamines catalyzed Michael reaction to generate chiral fluorinated quaternary carbon centers. Tetrahedron 2015. [DOI: 10.1016/j.tet.2015.04.103] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
|
14
|
Highly stereoselective construction of adjacent tetrasubstituted carbon stereogenic centres via an organocatalytic Mukaiyama-aldol reaction of monofluorinated silyl enol ethers to isatins. Org Chem Front 2014. [DOI: 10.1039/c4qo00126e] [Citation(s) in RCA: 63] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
15
|
Enantioselective synthesis of functionalized fluorinated dihydropyrano [2,3-c]pyrazoles catalyzed by a simple bifunctional diaminocyclohexane-thiourea. CHINESE CHEM LETT 2014. [DOI: 10.1016/j.cclet.2014.01.034] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
|
16
|
Recent progress on asymmetric organocatalytic construction of chiral cyclohexenone skeletons. Org Biomol Chem 2014; 12:2499-513. [DOI: 10.1039/c3ob42293c] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Chiral cyclohex-2-enones are important intermediates in synthetic chemistry as well as in the life science industries. In this focus review, recent advances in the organocatalytic asymmetric synthesis of chiral cyclohex-2-enone skeletons are summarized. The reaction mechanisms are also briefly discussed.
Collapse
|
17
|
The synthesis of cyclohexenone using l-proline immobilized on a silica gel catalyst by a continuous-flow approach. RSC Adv 2014. [DOI: 10.1039/c4ra01231c] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
|
18
|
Chiral Bicyclic Guanidine-Catalysed Conjugate Addition of α-Fluoro-β-Ketoesters to Cyclic Enones. Aust J Chem 2014. [DOI: 10.1071/ch14187] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
By utilising a chiral bicyclic guanidine as catalyst and triethylamine as additive, the first asymmetric Michael addition of α-fluoro-β-ketoesters to various cyclic enones has been successfully developed, affording a variety of Michael adducts with potential synthetic utilities with satisfactory stereoselectivity (up to 94 % ee and 4.3 : 1 dr).
Collapse
|
19
|
Catalytic C-C bond-forming multi-component cascade or domino reactions: pushing the boundaries of complexity in asymmetric organocatalysis. Chem Rev 2013; 114:2390-431. [PMID: 24304297 DOI: 10.1021/cr400215u] [Citation(s) in RCA: 864] [Impact Index Per Article: 78.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
|
20
|
Asymmetric Synthesis of Chiral Dihydrothiopyrans via an Organocatalytic Enantioselective Formal Thio [3 + 3] Cycloaddition Reaction with Binucleophilic Bisketone Thioethers. Org Lett 2013; 15:5570-3. [DOI: 10.1021/ol4027705] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
21
|
Organocatalytic formal [5+1] annulation: diastereoselective cascade synthesis of functionalized six-membered spirocyclic indane-1,3-diones/oxindoles via Michael–aldol reaction. Tetrahedron 2013. [DOI: 10.1016/j.tet.2013.07.084] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
|
22
|
Organocatalytic asymmetric Michael addition of ethyl nitroacetate to enones using natural amino acids-derived C1-symmetric chiral primary–secondary diamines. Tetrahedron Lett 2013. [DOI: 10.1016/j.tetlet.2013.04.005] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
|
23
|
Novel bifunctional thiourea–ammonium salt catalysts derived from amino acids: application to highly enantio- and diastereoselective aza-Henry reaction. Tetrahedron 2013. [DOI: 10.1016/j.tet.2013.04.079] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
|
24
|
Asymmetric Intramolecular Oxa-Michael Reactions to Tetrahydrofurans/2H-Pyrans Catalyzed by Primary–Secondary Diamines. ACS Catal 2013. [DOI: 10.1021/cs4002332] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
|
25
|
DABCO-mediated one-pot sequential transformation: convenient access to fluorinated 1H-pyrazol-5(4H)-ones. Tetrahedron Lett 2012. [DOI: 10.1016/j.tetlet.2012.06.110] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
|
26
|
Stereoselective Synthesis of Monofluoroalkyl α,β-Unsaturated Ketones From Allenyl Carbinol Esters Mediated by Gold and Selectfluor. J Org Chem 2012; 77:7725-9. [DOI: 10.1021/jo301239p] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
27
|
Stereoselective Synthesis of Fluorinated 2,3-Dihydroquinolin-4(1H)-ones via a One-Pot Multistep Transformation. J Org Chem 2012; 77:2398-406. [DOI: 10.1021/jo202693x] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
|
28
|
|
29
|
Asymmetric Michael addition of α-fluoro-α-phenylsulfonyl ketones to nitroolefins catalyzed by phenylalanine-based bifunctional thioureas. J Fluor Chem 2012. [DOI: 10.1016/j.jfluchem.2011.05.029] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
30
|
Enantioselective organocatalytic fluorination using organofluoro nucleophiles. Org Biomol Chem 2012; 10:479-85. [DOI: 10.1039/c1ob05840a] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
31
|
Highly Enantioselective Epoxidation of α,β-Unsaturated Ketones Catalyzed by Primary-Secondary Diamines. Adv Synth Catal 2011. [DOI: 10.1002/adsc.201100230] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
|
32
|
The Long-Arm Effect: Influence of Axially Chiral Phosphoramidite Ligands on the Diastereo- and Enantioselectivity of the Tandem 1,4-Addition/Fluorination. Angew Chem Int Ed Engl 2011; 50:9442-6. [DOI: 10.1002/anie.201104565] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2011] [Indexed: 11/11/2022]
|
33
|
The Long-Arm Effect: Influence of Axially Chiral Phosphoramidite Ligands on the Diastereo- and Enantioselectivity of the Tandem 1,4-Addition/Fluorination. Angew Chem Int Ed Engl 2011. [DOI: 10.1002/ange.201104565] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
|
34
|
Highly Enantio- and Diastereoselective Synthesis of β-Methyl-γ-monofluoromethyl-Substituted Alcohols. Chemistry 2011; 17:8066-70. [DOI: 10.1002/chem.201100929] [Citation(s) in RCA: 61] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2011] [Indexed: 11/07/2022]
|
35
|
Base-Mediated Aerobic Oxidation of Hagemann's Ester: Competitive Hydroxylation at C-1 and C-3 Positions. B KOREAN CHEM SOC 2011. [DOI: 10.5012/bkcs.2011.32.5.1725] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
|
36
|
Catalytic asymmetric Mannich-type reactions of fluorinated ketoesters with N-Boc aldimines in the presence of chiral palladium complexes. Tetrahedron Lett 2011. [DOI: 10.1016/j.tetlet.2011.02.087] [Citation(s) in RCA: 59] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
37
|
Asymmetric Mannich-type Reactions of Fluorinated Ketoesters with Binaphthyl-Modified Thiourea Catalysts. B KOREAN CHEM SOC 2011. [DOI: 10.5012/bkcs.2011.32.4.1195] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
|
38
|
Fluorinated Aromatic Ketones as Nucleophiles in the Asymmetric Organocatalytic Formation of CC and CN Bonds: A Facile Route to the Construction of Fluorinated Quaternary Stereogenic Centers. Chemistry 2011; 17:3571-4. [DOI: 10.1002/chem.201003761] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2010] [Indexed: 11/10/2022]
|
39
|
Enantioselective organocatalytic domino Michael–acetalization–Henry reactions of 2-hydroxynitrostyrene and aldehyde for the synthesis of tetrahydro-6H-benzo[c]chromenones. Org Biomol Chem 2011; 9:382-6. [DOI: 10.1039/c0ob00834f] [Citation(s) in RCA: 68] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
40
|
First asymmetric cascade reaction catalysed by chiral primary aminoalcohols. Org Biomol Chem 2011; 9:5079-85. [DOI: 10.1039/c1ob05400g] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
|
41
|
Highly enantioselective synthesis of α-fluoro-α-nitro esters via organocatalyzed asymmetric Michael addition. Tetrahedron 2011. [DOI: 10.1016/j.tet.2010.11.041] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
42
|
A Facile and Stereocontrolled Synthesis of γ-Substituted γ-Fluoroglutamates by Conjugate Addition: Conflicting Effect between Fluorinated Enaminoester and Hinderered Michael Acceptor. J Org Chem 2010; 75:7596-604. [DOI: 10.1021/jo101417c] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
43
|
Highly Enantioselective Addition of 1-Fluoro-1-nitro(phenylsulfonyl)methane to α,β-Unsaturated Aldehydes. European J Org Chem 2010. [DOI: 10.1002/ejoc.201000851] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
|
44
|
Asymmetric [3+2] Cycloadditions of Allenoates and Dual Activated Olefins Catalyzed by Simple Bifunctional N-Acyl Aminophosphines. Angew Chem Int Ed Engl 2010; 49:4467-70. [DOI: 10.1002/anie.201000446] [Citation(s) in RCA: 278] [Impact Index Per Article: 19.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|
45
|
Asymmetric [3+2] Cycloadditions of Allenoates and Dual Activated Olefins Catalyzed by Simple Bifunctional N-Acyl Aminophosphines. Angew Chem Int Ed Engl 2010. [DOI: 10.1002/ange.201000446] [Citation(s) in RCA: 103] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
|
46
|
Organocatalyzed enantioselective Michael additions of nitroalkanes to enones by using primary–secondary diamine catalysts. Chem Commun (Camb) 2010; 46:4130-2. [DOI: 10.1039/c002552f] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|