Simple Access to Highly Functional Bicyclic γ- and δ-Lactams: Origins of Chirality Transfer to Contiguous Tertiary/Quaternary Stereocenters Assessed by DFT
作者:Ronan Le Goff、Arnaud Martel、Morgane Sanselme、Ata Martin Lawson、Adam Daïch、Sébastien Comesse
DOI:10.1002/chem.201405094
日期:2015.2.9
Michael acceptors, which leads efficiently to bicyclic lactams. The process is compatible with unsymmetrical electron‐withdrawing groups on the Michael acceptor, which allows the formation of two contiguous and fully controlled tertiary and quaternarystereocenters. In the case of tetrasubstituted Michael acceptors, two adjacent quaternarystereocenters are formed in good yield. Starting from (R)‐phenylglycinol
KORCHEVIN, N. A.;USOVA, T. L.;VASILEV, A. V.;DOROFEEV, I. A.;USOV, V. A.;+, ZH. ORGAN. XIMII, 1986, 22, N 3, 580-584
作者:KORCHEVIN, N. A.、USOVA, T. L.、VASILEV, A. V.、DOROFEEV, I. A.、USOV, V. A.、+
DOI:——
日期:——
Unraveling Structure−Reactivity Relationships in S<sub>N</sub>V Reactions: Kinetics of the Reactions of Methoxybenzylidenemalononitrile, 2-(Methylthiobenzylidene)-1,3-indandione, 2-(Benzylthiobenzylidene)-1,3-indandione, and Methyl β-Methylthio-α-nitrocinnamate with OH<sup>-</sup> and Thiolate Ions in Aqueous DMSO
作者:Claude F. Bernasconi、Rodney J. Ketner、Mark L. Ragains、Xin Chen、Zvi Rappoport
DOI:10.1021/ja003536t
日期:2001.3.1
The kinetics of the title reactions were determined in 50% DMSO-50% water (v/v) at 20 degrees C; n-BuS-, HOCH2CH2S-, and MeO2CCH2S- were used as thiolateions. The reactions with the thiolateions gave rise to two separate kinetic processes. The first refers to rapid, reversible attachment of RS- to the substrate leading to a tetrahedral intermediate (k1RS), k(-1)RS, the second to the conversion of