作者:Masato Koreeda、Hiroshi Akagi
DOI:10.1016/s0040-4039(00)71369-4
日期:——
An efficient and general synthetic method for various 2-mono- and 2,6-disubstituted γ-pyrones has been developed. This utilizes the C-acylation (70–85%) of β-methoxy-α,β-enone lithium enolates 4 by acid chlorides 3 followed by the acid-catalyzed cyclization (>80%) of the resulting enols 5 to γ-pyrones 6.
已经开发出一种有效且通用的合成方法,用于各种2-单-和2,6-二取代的γ-吡喃酮。该方法利用酰基氯3对β-甲氧基-α,β-烯酮烯醇酸锂4进行C-酰化(70-85%),然后将所得的烯醇5转化为γ-吡喃酮进行酸催化的环化(> 80%)。六