1
|
Ganie MA, Bhat MUS, Rizvi MA, Raheem S, Shah BA. Synthesis of 1,2-oxazetidines with a free -NH group via photoredox catalysis. Chem Commun (Camb) 2022; 58:8508-8511. [PMID: 35801422 DOI: 10.1039/d2cc02892a] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
A photoredox approach enabling one-step synthesis of oxazetidines with a free -NH group via the combined use of alkyne, thiophenol, and azide has been reported. The synthesized oxazetidine with the free -NH group was stable enough for various late-stage transformations such as methylation, acetylation, tosylation, and ring-opening reaction to afford synthetically useful α-aminoketones.
Collapse
Affiliation(s)
- Majid Ahmad Ganie
- Academy of Scientific and Industrial Research (AcSIR), Ghaziabad-201002, India.,Natural Product & Medicinal Chemistry, CSIR-Indian Institute of Integrative Medicine, Jammu-180001, India.
| | - Muneer-Ul-Shafi Bhat
- Academy of Scientific and Industrial Research (AcSIR), Ghaziabad-201002, India.,Natural Product & Medicinal Chemistry, CSIR-Indian Institute of Integrative Medicine, Jammu-180001, India.
| | | | - Shabnam Raheem
- Department of Chemistry, University of Kashmir, Srinagar, 190006, India
| | - Bhahwal Ali Shah
- Academy of Scientific and Industrial Research (AcSIR), Ghaziabad-201002, India.,Natural Product & Medicinal Chemistry, CSIR-Indian Institute of Integrative Medicine, Jammu-180001, India.
| |
Collapse
|
2
|
Wu B, Yang J, Gao M, Hu L. Ring-Strain-Enabled Catalytic Asymmetric Umpolung C–O Bond-Forming Reactions of 1,2-Oxazetidines for the Synthesis of Functionalized Chiral Ethers. Org Lett 2020; 22:5561-5566. [DOI: 10.1021/acs.orglett.0c01916] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Affiliation(s)
- Binyu Wu
- Chongqing Key Laboratory of Natural Product Synthesis and Drug Research, School of Pharmaceutical Sciences, Chongqing University, Chongqing 401331, P.R. China
| | - Jinggang Yang
- Chongqing Key Laboratory of Natural Product Synthesis and Drug Research, School of Pharmaceutical Sciences, Chongqing University, Chongqing 401331, P.R. China
| | - Min Gao
- Chongqing Key Laboratory of Natural Product Synthesis and Drug Research, School of Pharmaceutical Sciences, Chongqing University, Chongqing 401331, P.R. China
| | - Lin Hu
- Chongqing Key Laboratory of Natural Product Synthesis and Drug Research, School of Pharmaceutical Sciences, Chongqing University, Chongqing 401331, P.R. China
| |
Collapse
|
3
|
Zhang J, Xiao D, Tan H, Liu W. Highly Selective Synthesis of 2- tert-Butoxy-1-Arylethanones via Copper(I)-Catalyzed Oxidation/ tert-Butoxylation of Aryl Olefins with TBHP. J Org Chem 2020; 85:3929-3935. [PMID: 32052627 DOI: 10.1021/acs.joc.9b03156] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
A practical and environmentally friendly protocol for the selective oxidation of aryl olefins to arylethanone derivatives by using a Cu(I) catalyst and tert-butyl hydroperoxide (TBHP) has been developed. A series of 2-tert-butoxy-1-arylethanones were obtained in moderate to good yields under mild conditions with high selectivity. In this method, TBHP acts not only as an oxidant but also as the tert-butoxy and carbonyl oxygen sources. This enables one-step oxidation/tert-butoxylation. Various allyl peroxides were also synthesized from allyl substrates.
Collapse
Affiliation(s)
- Jiantao Zhang
- College of Chemistry, Guangdong University of Petrochemical Technology, Guandu Road, Maoming 525000, People's Republic of China
| | - Duoduo Xiao
- College of Chemistry, Guangdong University of Petrochemical Technology, Guandu Road, Maoming 525000, People's Republic of China
| | - Hua Tan
- College of Chemistry, Guangdong University of Petrochemical Technology, Guandu Road, Maoming 525000, People's Republic of China
| | - Weibing Liu
- College of Chemistry, Guangdong University of Petrochemical Technology, Guandu Road, Maoming 525000, People's Republic of China
| |
Collapse
|
4
|
Affiliation(s)
- Jinggang Yang
- Chongqing Key Laboratory of Natural Product Synthesis and Drug Research School of Pharmaceutical SciencesChongqing University Chongqing 401331 China
| | - Binyu Wu
- Chongqing Key Laboratory of Natural Product Synthesis and Drug Research School of Pharmaceutical SciencesChongqing University Chongqing 401331 China
| | - Lin Hu
- Chongqing Key Laboratory of Natural Product Synthesis and Drug Research School of Pharmaceutical SciencesChongqing University Chongqing 401331 China
- Guangdong Provincial Key Lab of Nano-Micro Material Research School of Chemical Biology and BiotechnologyPeking University Shenzhen Graduate School Shenzhen 518055 China
| |
Collapse
|
5
|
Zhang Q, Ablajan K, Wang B, Ma H, Guo Z. One-Pot Synthesis of Indolizines Using TBHP as the Methylene Source Under Metal-Free Condition. European J Org Chem 2020. [DOI: 10.1002/ejoc.201901803] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Qianwei Zhang
- Key Laboratory of Oil & Gas Fine Chemicals; Ministry of Education & Xinjiang Uyghur Autonomous Region; College of Chemistry and Chemical Engineering; Xinjiang University; 830046 Urumqi PR China
| | - Keyume Ablajan
- Key Laboratory of Oil & Gas Fine Chemicals; Ministry of Education & Xinjiang Uyghur Autonomous Region; College of Chemistry and Chemical Engineering; Xinjiang University; 830046 Urumqi PR China
| | - Bin Wang
- Key Laboratory of Oil & Gas Fine Chemicals; Ministry of Education & Xinjiang Uyghur Autonomous Region; College of Chemistry and Chemical Engineering; Xinjiang University; 830046 Urumqi PR China
| | - Huifang Ma
- Key Laboratory of Oil & Gas Fine Chemicals; Ministry of Education & Xinjiang Uyghur Autonomous Region; College of Chemistry and Chemical Engineering; Xinjiang University; 830046 Urumqi PR China
| | - Zhongqi Guo
- Key Laboratory of Oil & Gas Fine Chemicals; Ministry of Education & Xinjiang Uyghur Autonomous Region; College of Chemistry and Chemical Engineering; Xinjiang University; 830046 Urumqi PR China
| |
Collapse
|
6
|
Mutra MR, Dhandabani GK, Li J, Wang JJ. Regio- and chemoselective synthesis of nitrogen-containing heterocycles via the oxidative cascade cyclization of unactivated 1,n-enynes. Chem Commun (Camb) 2020; 56:2051-2054. [DOI: 10.1039/c9cc07820g] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The development of a method for performing radical initiated intramolecular cascade cyclization of 1,n-enynes provided a competent protocol for producing structurally diverse complex heterocycles.
Collapse
Affiliation(s)
- Mohana Reddy Mutra
- Department of Medicinal and Applied Chemistry
- Kaohsiung Medical University
- Kaohsiung City 807
- Taiwan
| | - Ganesh Kumar Dhandabani
- Department of Medicinal and Applied Chemistry
- Kaohsiung Medical University
- Kaohsiung City 807
- Taiwan
| | - Jing Li
- Department of Medicinal and Applied Chemistry
- Kaohsiung Medical University
- Kaohsiung City 807
- Taiwan
| | - Jeh-Jeng Wang
- Department of Medicinal and Applied Chemistry
- Kaohsiung Medical University
- Kaohsiung City 807
- Taiwan
- Department of Medical Research
| |
Collapse
|
7
|
Laudenschlager JE, Combee LA, Hilinski MK. Intermolecular scandium triflate-promoted nitrene-transfer [5 + 1] cycloadditions of vinylcyclopropanes. Org Biomol Chem 2019; 17:9413-9417. [PMID: 31641723 DOI: 10.1039/c9ob01858a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Sc(OTf)3-promoted [5 + 1] cycloaddition of vinylcyclopropanes with PhINTs is reported, enabling the regioselective preparation of a range of 1,2,3,6-tetrahydropyridine scaffolds under mild conditions. This represents the second example of a [5 + 1] nitrene-transfer cycloaddition and exhibits complementary substrate scope to the antecedent work, expanding the range of N-heterocycles accessible via this strategy.
Collapse
Affiliation(s)
- Julie E Laudenschlager
- Department of Chemistry, University of Virginia, Charlottesville, Virginia 22904-4319, USA.
| | | | | |
Collapse
|
8
|
Combee LA, Johnson SL, Laudenschlager JE, Hilinski MK. Rh(II)-Catalyzed Nitrene-Transfer [5 + 1] Cycloadditions of Aryl-Substituted Vinylcyclopropanes. Org Lett 2019; 21:2307-2311. [PMID: 30907595 DOI: 10.1021/acs.orglett.9b00594] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Formal [5 + 1] cycloadditions between aryl-substituted vinylcyclopropanes and nitrenoid precursors are reported. The method, which employs Rh2(esp)2 as a catalyst, leads to the highly regioselective formation of substituted tetrahydropyridines. Preliminary mechanistic studies support a stepwise, polar mechanism enabled by the previously observed Lewis acidity of Rh-nitrenoids. Overall, this work expands the application of nitrene-transfer cycloaddition, a relatively underexplored approach to heterocycle synthesis, to the formation of six-membered rings.
Collapse
Affiliation(s)
- Logan A Combee
- Department of Chemistry , University of Virginia , Charlottesville , Virginia 22904-4319 , United States
| | - Shea L Johnson
- Department of Chemistry , University of Virginia , Charlottesville , Virginia 22904-4319 , United States
| | - Julie E Laudenschlager
- Department of Chemistry , University of Virginia , Charlottesville , Virginia 22904-4319 , United States
| | - Michael K Hilinski
- Department of Chemistry , University of Virginia , Charlottesville , Virginia 22904-4319 , United States
| |
Collapse
|