作者:Antonio L. Coelho、Mario L. A. A. Vasconcellos、Alessandro B. C. Simas、Jaime A. Rabi、Paulo R. R. Costa
DOI:10.1055/s-1992-26257
日期:——
Coupling of 7-methoxy-8-(3-methyl-2-butenyl)-2H-1-benzopyran (4a) with 2-chloromercurio-4,5-methylenedioxyphenol (5) yields (±)-6a, 12a-cis-dihydro-3-methoxy-4-(3-methyl-2-butenyl)-6H-[1,3]dioxolo [5,6]benzofuro[3,2-c][1]benzopyran (6; ±-4-prenylpterocarpin) in an efficient manner. An improved procedure for the preparation of chromenes is reported.
7-甲氧基-8-(3-甲基-2-丁烯基)-2H-1-苯并吡喃(4a)与2-氯汞-4,5-亚甲基二氧基苯酚(5)的偶联以有效的方式产生(±)-6a,12a-顺式二氢-3-甲氧基-4-(3-甲基-2-丁烯基)-6H-[1,3]二氧杂环戊烯并[5,6]苯并呋喃并[3,2-c][1]苯并吡喃(6;±-4-异戊烯基蝶呤)。本文报道了一种改进的苯并吡喃制备方法。