Free-radical hydrothiolation of the endocyclic double bond of enoses is reported. Reaction between 2-acetoxy-d-glucal and a range of thiols including amino acid, peptide, glycosyl thiols, and sugars with primary or secondary thiol functions gave S-linked α-glucoconjugates and S-disaccharides with full regio- and stereoselectivity. Addition of glycosyl thiols to a 2,3-unsaturated glycoside also proceeded
报导了烯类的内环双键的自由基氢硫基化。之间的反应2-乙酰氧基- d -glucal和一系列硫醇,包括氨基酸,肽,糖基硫醇,和糖用伯或仲硫醇的功能都给小号-连接的α-glucoconjugates和小号具有完全区域选择性和立体选择性-disaccharides。糖基硫醇向2,3-不饱和糖苷的添加也以良好的选择性进行,并提供了一系列3-脱氧-S-二糖。
Pyrrolidine and thiazole derivatives with antibacterial and .
申请人:SmithKline Beecham p.l.c.
公开号:US06022885A1
公开(公告)日:2000-02-08
This invention relates to a method of treating bacterial infections in humans or animals comprising administering, in combination with a .beta.-lactam antibiotic, a therapeutically effective amount of a compound of formula (I). ##STR1##
New compounds have the formula:
1
wherein R, R
1
, X and Y have the meanings described herein. Methods are set forth for synthesizing these compounds and using these compounds to treat diseases associated with amyloidosis, such as Alzheimer's disease, maturity onset diabetes mellitus, familial amyloid polyneuropathy, scrapie, and Kreuzfeld-Jacob disease.