CuCN catalyzed one pot synthesis of γ-keto diesters: domino double Michael addition followed by Nef reaction
作者:Saleem Farooq、Payare L. Sangwan、Rajeshwar R. Aleti、Praveen K. Chinthakindi、Mushtaq A. Qurishi、Surrinder Koul
DOI:10.1016/j.tetlet.2012.04.071
日期:2012.6
An efficient one pot synthesis of γ-keto diesters through double Michael addition coupled with Nef reaction in the presence of CuCN catalyst and Cs2CO3 base is described. The reaction proceeds rapidly in DCM to give the products in good yields. A plausible mechanism is proposed.
描述了在CuCN催化剂和Cs 2 CO 3碱存在下,通过双迈克尔加成和Nef反应有效地一锅合成γ-酮二酯。该反应在DCM中快速进行,以高收率得到产物。提出了一种合理的机制。
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