Additive controlled, stereoselective benzylation of 2-thioxotetrahydropyrimidin-4(1H)-ones via chiral induction from a remote stereocenter
摘要:
Stereoselective alkylation reactions of 3-aryl-1-alkyl-2-thioxotetrahydropyrimidin-4(1H)-one derivatives were studied. The reaction conditions were optimized to obtain the monobenzylated adduct with improved diastereoselectivity by regulating the reaction kinetics using HMPA as the additive and chiral ethyl lactate as the quencher. The absolute configuration of the product was established by NMR experiments, computational calculations, and single crystal X-ray analysis. (C) 2012 Elsevier Ltd. All rights reserved.
New cyclic zwitterionic building blocks for the synthesis of piperidine-2,4-dione and pyridine-2-one compounds
作者:Angel Palillero、Joel L. Terán、Dino Gnecco、Jorge R. Juárez、María L. Orea、Alejandro Castro
DOI:10.1016/j.tetlet.2009.02.143
日期:2009.7
we describe the synthesis of new chiral cyclic zwitterionic pyridin-2-one compounds 5a,b via an intramolecular ring-closure reaction of a stabilize amide sulfurylide 4a,b derived from (R)-(−)-2-phenylglycinol and (R)-(+)-phenylethylamine in a high yield. In addition, we proved the utility of 5a,b to produce piperidine-2,4-dione 6a,b and pyridine-2-one 7a,b depending on the reaction conditions.
CRYSTAL OF 1,3,5-TRIAZINE DERIVATIVE OR SOLVATE THEREOF AND METHOD
FOR PRODUCING SAME
申请人:Shionogi & Co., Ltd.
公开号:US20220396561A1
公开(公告)日:2022-12-15
A crystal of a 1,3,5-triazine derivative or a solvate thereof, and a method for producing the same are provided. The present invention relates to a crystal of a compound represented by Formula (I) or a solvate thereof:
and relates to a pharmaceutical composition containing the same. The present invention also relates to a crystal of a compound represented by Formula (I), or a solvate thereof.
[EN] CRYSTAL OF 1,3,5-TRIAZINE DERIVATIVE OR SOLVATE THEREOF AND METHOD FOR PRODUCING SAME<br/>[FR] CRISTAL DE DÉRIVÉ DE 1,3,5-TRIAZINE OU SOLVATE DE CELUI-CI ET SON PROCÉDÉ DE PRODUCTION<br/>[JA] 1,3,5-トリアジン誘導体またはその溶媒和物の結晶およびその製造方法