Nucleophilic alkenoylation of aldehydes with metalated α-aminonitriles: regioselective synthesis of α-hydroxyenones
摘要:
An efficient regioselective two-step synthesis of alpha-hydroxyenones 3a-p is reported. The methodology involves nucleophilic addition of metalated beta,gamma-unsaturated-alpha-aminonitriles to aldehydes, followed by a mild silver nitrate induced hydrolysis of the aminonitrile adducts to afford the title compounds in overall yields of 61-83%. (C) 1999 Elsevier Science Ltd. All rights reserved.
Reaction of dithio-substituted cinnamyllithium with carbonyl compounds: a test of the HSAB principle
作者:Jim-Min Fang、Ming-Yi Chen、Wen-Jin Yang
DOI:10.1016/s0040-4039(00)82231-5
日期:1988.1
By mediation of BF3.Et2O, dithio-substituted cinnamyllithium 2 reacted predominantly at the α-site with carbonylcompounds. No selectivity was found when the reaction was performed in the absence of BF3.Et2O.