Reactions of silyl nitronates with dimethylformamide dimethyl acetal as a new general procedure for the synthesis of 2-nitroenamines
作者:Alexander S. Shved、Andrey A. Tabolin、Yulia A. Khomutova、Sema L. Ioffe
DOI:10.1016/j.tetlet.2014.09.071
日期:2014.11
Silyl nitronates obtained in situ from the corresponding aliphatic nitro compounds react with dimethylformamide dimethyl acetal giving 2-nitroenamines in moderate to good yields. The reaction pathway is discussed.
Synthesis of (±)-CP-99994: A highly potent substance P antagonist
作者:Manoj C. Desai、Peter F. Thadeio、Sheri L. Lefkowitz
DOI:10.1016/s0040-4039(00)73791-9
日期:1993.9
The synthesis of racemic CP-99,994, a highly potentsubstancePantagonist is reported. The synthesis outlined here is suitable for developing structure activity relationships for this important class of compounds.
Synthesis of γ-Nitro Aliphatic Methyl Esters Via Michael Additions Promoted by Microwave Irradiation
作者:Jaime Escalante、Francisco Díaz-Coutiño
DOI:10.3390/molecules14041595
日期:——
A simple and efficient protocol has been developed for the direct synthesis of γ-nitrobutyric acid methyl esters under microwave irradiation. This methodology reduces reaction times from days to minutes, compared to conventional conditions. Additionally, these conditions increased yields and provided cleaner reactions.
Effect of the Substituent and Amino Group Position on the Lipase‐Catalyzed Resolution of γ‐Amino Esters: A Molecular Docking Study Shedding Light on<i>Candida antarctica</i>lipase B Enantioselectivity
作者:Marina A. Ortega‐Rojas、Edmundo Castillo、Rodrigo Said Razo‐Hernández、Nina Pastor、Eusebio Juaristi、Jaime Escalante
DOI:10.1002/ejoc.202100712
日期:2021.9.14
In contrast to N-protected β3-amino esters, the CandidaantarcticalipaseBcatalyzedkineticresolution of amino esters holding alpha (γ2), beta (γ3), and gamma (γ4) stereocenters is strongly compromised by steric factors at the level of the catalytic cavity. Molecular docking studies helped establish that the steric exclusion region involves the Ile189 and Val190 residues and the amino bonding region