Regio- and Diastereoselectivity in the Thiomethylation of α-(1-Hydroxyalkyl)acrylate Derivatives
作者:Philip O. Deane、Jeffry J. Guthrie-Strachan、Perry T. Kaye、Ruth E. Whittaker
DOI:10.1080/00397919808004829
日期:1998.7
Abstract The regio-and diastereoselectivity of reactions of selected α-(1-hydroxyalkyl)acrylate derivatives with sodium methanethiolate have been investigated. The hydroxy compounds typically undergo conjugate addition with up to 66% d.e., while the acetoxy and bromo analogues favour SN' and SN reactions, respectively.
摘要 研究了选定的 α-(1-羟烷基)丙烯酸酯衍生物与甲硫醇钠反应的区域选择性和非对映选择性。羟基化合物通常以高达 66% 的 de 进行共轭加成,而乙酰氧基和溴类似物分别有利于 SN' 和 SN 反应。
Identification of 6-substituted 4-arylsulfonyl-1,4-diazepane-2,5-diones as a novel scaffold for human chymase inhibitors
A novel series of 6-substituted 4-sulfonyl-1,4-diazepane-2,5-diones were designed, synthesized and evaluated as human chymase inhibitors. Structure-activity relationship studies led to the identification of a potent inhibitor, (6S)-6-(5-chloro-2-methoxybenzyl)-4-[(4-chlorophenyl)sulfonyl]-1,4-diazepane-2,5-dione, with an IC50 of 0.027 mu M. (c) 2007 Elsevier Ltd. All rights reserved.
A kinetic and mechanistic study of the Baylis-Hillman reaction
作者:Moira L. Bode、Perry T. Kaye
DOI:10.1016/0040-4039(91)80098-q
日期:1991.9
Reactions of acrylate esters with pyridinecarboxaldehydes, in the presence of 3-hydroxyquinuclidine or 1,4-diazabicyclo[2.2.2] octane, have been followed by H-1 NMR spectroscopy, and a mechanism which accommodates the kinetic data has been presented.
GRAPHICAL ABSTRACT ABSTRACT Trimethylsilyl iodide (TMSI) is introduced as an efficient reagent for the one-pot and direct transformation of carbamates of unsaturated β-aminoesters into the corresponding α-methylene-β-lactams and α-arylidene-β-lactams. The mild reaction conditions, excellent yields and easy work-up procedures make it a useful alternative to previously applied procedures for the rapid