1
|
Efficient conversion of d-mannitol into 1,2:5,6-diacetonide with Aquivion-H as a recyclable catalyst. Carbohydr Res 2020; 499:108229. [PMID: 33401228 DOI: 10.1016/j.carres.2020.108229] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2020] [Revised: 12/23/2020] [Accepted: 12/24/2020] [Indexed: 11/22/2022]
Abstract
Heterogeneous solid catalysis by the commercially available perfluorosulfonic ionomer Aquivion-H allowed 1,2:5,6-diacetonide of d-mannitol (1), immediate precursor of important unichiral C3-synthons, to be efficiently obtained from d-mannitol and 2,2-dimethoxypropane in DMF at room temperature. The 1,2-monoacetonide, whose intermediate formation is the rate-limiting step, could be almost completely converted into 1 with limited concurrent transformation of 1 into triacetonides. In line with recent literature reports, these results indicate that heterogeneous catalysis by Aquivion-H surpasses the performances of homogeneous acidic catalysis assuring, presumably for its peculiar morphology, a higher product selectivity. Easy recovery at the end of the reaction and recyclability are additional advantages of this solid acid catalyst.
Collapse
|
2
|
Bavo F, Pallavicini M, Gotti C, Appiani R, Moretti M, Colombo SF, Pucci S, Viani P, Budriesi R, Renzi M, Fucile S, Bolchi C. Modifications at C(5) of 2-(2-Pyrrolidinyl)-Substituted 1,4-Benzodioxane Elicit Potent α4β2 Nicotinic Acetylcholine Receptor Partial Agonism with High Selectivity over the α3β4 Subtype. J Med Chem 2020; 63:15668-15692. [PMID: 33325696 DOI: 10.1021/acs.jmedchem.0c01150] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A series of diastereomeric 2-(2-pyrrolidinyl)-1,4-benzodioxanes bearing a small, hydrogen-bonding substituent at the 7-, 6-, or 5-position of benzodioxane have been studied for α4β2 and α3β4 nicotinic acetylcholine receptor affinity and activity. Analogous to C(5)H replacement with N and to a much greater extent than decoration at C(7), substitution at benzodioxane C(5) confers very high α4β2/α3β4 selectivity to the α4β2 partial agonism. Docking into the two receptor structures recently determined by cryo-electron microscopy and site-directed mutagenesis at the minus β2 side converge in indicating that the limited accommodation capacity of the β2 pocket, compared to that of the β4 pocket, makes substitution at C(5) rather than at more projecting C(7) position determinant for this pursued subtype selectivity.
Collapse
Affiliation(s)
- Francesco Bavo
- Dipartimento di Scienze Farmaceutiche, Università degli Studi di Milano, Via Mangiagalli 25, I-20133 Milano, Italy
| | - Marco Pallavicini
- Dipartimento di Scienze Farmaceutiche, Università degli Studi di Milano, Via Mangiagalli 25, I-20133 Milano, Italy
| | - Cecilia Gotti
- Institute of Neuroscience, CNR, Via Vanvitelli 32, I-20129 Milano, Italy
| | - Rebecca Appiani
- Dipartimento di Scienze Farmaceutiche, Università degli Studi di Milano, Via Mangiagalli 25, I-20133 Milano, Italy
| | - Milena Moretti
- Institute of Neuroscience, CNR, Via Vanvitelli 32, I-20129 Milano, Italy.,Department of Medical Biotechnology and Translational Medicine, Università degli Studi di Milano, Via Vanvitelli 32, I-20129 Milano, Italy
| | | | - Susanna Pucci
- Institute of Neuroscience, CNR, Via Vanvitelli 32, I-20129 Milano, Italy.,Hunimed University, Via Rita Levi-Montalcini 4, Pieve Emanuele, I-20090 Milan, Italy
| | - Paola Viani
- Department of Medical Biotechnology and Translational Medicine, Università degli Studi di Milano, Via Vanvitelli 32, I-20129 Milano, Italy
| | - Roberta Budriesi
- Dipartimento di Farmacia e Biotecnologie, Università degli Studi di Bologna, Via Belmeloro 6, I-40126 Bologna, Italy
| | - Massimiliano Renzi
- Dipartimento di Fisiologia e Farmacologia, Sapienza Università di Roma, Piazzale Moro 5, 00185 Roma, Italy
| | - Sergio Fucile
- Dipartimento di Fisiologia e Farmacologia, Sapienza Università di Roma, Piazzale Moro 5, 00185 Roma, Italy.,I.R.C.C.S. Neuromed, Via Atinese 18, 86077 Pozzilli, Italy
| | - Cristiano Bolchi
- Dipartimento di Scienze Farmaceutiche, Università degli Studi di Milano, Via Mangiagalli 25, I-20133 Milano, Italy
| |
Collapse
|
4
|
Airoldi V, Piccolo O, Roda G, Appiani R, Bavo F, Tassini R, Paganelli S, Arnoldi S, Pallavicini M, Bolchi C. Efficient One-Pot Reductive Aminations of Carbonyl Compounds with Aquivion-Fe as a Recyclable Catalyst and Sodium Borohydride. European J Org Chem 2019. [DOI: 10.1002/ejoc.201901614] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Veronica Airoldi
- Dipartimento di Scienze Farmaceutiche; Università degli Studi di Milano; via Mangiagalli 25 20133 Milano Italy
| | | | - Gabriella Roda
- Dipartimento di Scienze Farmaceutiche; Università degli Studi di Milano; via Mangiagalli 25 20133 Milano Italy
| | - Rebecca Appiani
- Dipartimento di Scienze Farmaceutiche; Università degli Studi di Milano; via Mangiagalli 25 20133 Milano Italy
| | - Francesco Bavo
- Dipartimento di Scienze Farmaceutiche; Università degli Studi di Milano; via Mangiagalli 25 20133 Milano Italy
| | - Riccardo Tassini
- Dipartimento di Scienze Molecolari e Nanosistemi; Università Ca' Foscari Venezia; Via Torino 155 30170 Venezia Mestre Italy
| | - Stefano Paganelli
- Dipartimento di Scienze Molecolari e Nanosistemi; Università Ca' Foscari Venezia; Via Torino 155 30170 Venezia Mestre Italy
| | - Sebastiano Arnoldi
- Dipartimento di Scienze Farmaceutiche; Università degli Studi di Milano; via Mangiagalli 25 20133 Milano Italy
| | - Marco Pallavicini
- Dipartimento di Scienze Farmaceutiche; Università degli Studi di Milano; via Mangiagalli 25 20133 Milano Italy
| | - Cristiano Bolchi
- Dipartimento di Scienze Farmaceutiche; Università degli Studi di Milano; via Mangiagalli 25 20133 Milano Italy
| |
Collapse
|
5
|
1H NMR spectroscopy in the presence of Mosher acid to rapidly determine the enantiomeric composition of amino acid benzyl esters, chirons susceptible to easy racemization. Amino Acids 2018; 50:1759-1767. [DOI: 10.1007/s00726-018-2653-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2018] [Accepted: 09/10/2018] [Indexed: 12/21/2022]
|