Dakin-West Trick in the Design of Novel 2-Alkyl(aralkyl) Derivatives of Oxazolo[3,2-a]pyridines
作者:Zeinul-Gabiden Kazhkenov、Alexander Bush、Eugene Babaev
DOI:10.3390/10091109
日期:——
oxazolo[3,2-a]pyridines III were obtained via tandem ring opening and ring closure from stable mesoionic 3-acyloxazolo[3,2-a]pyridinium-2-olates I. The key intermediates of this tandem transformation are N-(b-oxoethyl)pyridones-2 II obtained by Dakin-West acylation of (pyridone-2-yl-1)acetic acid. An example of further utilization of this strategy is illustrated by preparation of unknown 2-benzylimidazo[1
通过串联开环和闭环从稳定的介离子 3-酰基恶唑并 [3,2-a] 吡啶鎓中获得了一系列以前无法获得的恶唑并 [3,2-a] 吡啶的 2-烷基-和 2-苄基衍生物的衍生物- 2-olates I. 这种串联转化的关键中间体是通过 (pyridone-2-yl-1) 乙酸的 Dakin-West 酰化获得的 N-(b-oxoethyl)pyridones-2 II。通过从盐 I 和氨制备未知的 2-苄基咪唑并 [1,2-a] 吡啶来说明进一步利用该策略的一个例子。