An Efficient Synthesis of 2-Substituted 4-Formyl-4,5,6,7-tetrahydrobenzo[<i>b</i>]furans
作者:S. Bernasconi、G. Jommi、S. Montanari、M. Sisti
DOI:10.1055/s-1987-28196
日期:——
The conjugate addition of 2-lithio-1,3-dithiane to 2-cyclohexenone followed by quenching of the intermediate enolate anoin with α-chloroacyl chlorides affords 2-substituted 4-(1,3-dithian-2-yl)-4,5,6,7-tetrahydro-3(2H)benzofuranones which can be transformed to the title compounds in good overall yields.
2-锂-1,3-二噻烷与2-环己烯酮的共轭加成,然后用α-氯酰氯猝灭中间体烯醇阴离子,得到2-取代的4-(1,3-二噻烷-2-基)-4 ,5,6,7-四氢-3(2H)苯并呋喃酮,其可以以良好的总产率转化为标题化合物。