1,5-Rhodium Shift in Rearrangement ofN-Arenesulfonylazetidin-3-ols into Benzosultams
摘要:
Benzosultams are synthesized in an enantiopure form starting from alpha-amino acids through a rhodium-catalyzed rearrangement reaction of N-arenesulfonylazetidin-3-ols. Mechanistically, this reaction involves C-C bond cleavage by beta-carbon elimination and C-H bond cleavage by a 1,5-rhodium shift.
UDP GLYCOSYLTRANSFERASE INHIBITORS AND METHODS OF USE
申请人:GENZYME CORPORATION
公开号:US20200102324A1
公开(公告)日:2020-04-02
Described herein is a compound of Formula (I),
and pharmaceutically acceptable salts thereof. Also described herein are compositions and the use of such compositions in methods of treating a variety of diseases and conditions, in particular Krabbe's Disease (KD) and Metachromatic leukodystrophy (MLD).
structure and stereochemistry of polyoximic acid, a degradation product of polyoxins, was originally designated as trans-3-ethylidene-L-azetidine-2-carboxylic acid. However, total synthesis revealed that the correct structure was in fact cis-3-ethylidene-L-azetidine-2-carboxylic acid, which was confirmed by X-ray crystallography. The synthesis of the trans-isomer was also done and its identity was confirmed
聚肟酸是一种多氧化合物的降解产物,其结构和立体化学最初被命名为反式-3-亚乙基-L-氮杂环丁烷-2-羧酸。然而,全合成表明正确的结构实际上是顺-3-亚乙基-L-氮杂环丁烷-2-羧酸,这通过X射线晶体学证实。反式异构体的合成也已完成,其身份也通过 X 射线分析得到证实。构建四元环的关键步骤是铑催化的类卡宾插入到β-氨基酸衍生物的N 2 H 键中。通过进行 Horner-Emmons-Wadsworth 或 Wittig 反应以分别产生反式和顺式异构体来控制外双键的立体选择性。温雷布' s 酰胺用作潜在的甲基,用于分离反式和顺式混合物。通过广泛的 2D NMR 研究也证实母体多肟中多肟酸的双键立体化学是顺式的。 关键词:重氮插入,...
1,5-Rhodium Shift in Rearrangement of<i>N</i>-Arenesulfonylazetidin-3-ols into Benzosultams
Benzosultams are synthesized in an enantiopure form starting from alpha-amino acids through a rhodium-catalyzed rearrangement reaction of N-arenesulfonylazetidin-3-ols. Mechanistically, this reaction involves C-C bond cleavage by beta-carbon elimination and C-H bond cleavage by a 1,5-rhodium shift.