Catalytic oxidations of enolizable ketones using 2-alkylidene-4-oxothiazolidine vinyl bromide
摘要:
Direct oxidation of enolizable ketones to alpha-hydroxy derivatives, vicinal dicarbonyls or tricarbonyl compounds has been achieved by a catalytic amount of 2-alkylidene-4-oxothiazolidine vinyl bromide in DMSO as a solvent. The yields range from moderate to good. (C) 2011 Elsevier Ltd. All rights reserved.
Base-Controlled Reactions through an Aldol Intermediate Formed between 2-Oxoaldehydes and Malonate Half Esters
作者:Atul Kumar、Shahnawaz Khan、Qazi Naveed Ahmed
DOI:10.1021/acs.orglett.7b02016
日期:2017.9.15
atom-economical, base-directed, and highlyefficient method for the generation of different selective products through a common aldol intermediate of 2-oxoaldehydes and malonate half esters is successfully developed. The addition of a strong basic environment (potassium tert-butoxide) catalyzed the synthesis of stable decarboxylative aldol products (α-hydroxyketones), while the Doebner modification procedure