Total Synthesis of Angucyclines. Part 13: Biomimetic-type Approach to a Potential Precursor of the Landomycinone Angucyclinone
作者:Karsten Krohn、Peter Frese、Christian Freund
DOI:10.1016/s0040-4020(00)00023-5
日期:2000.2
with two vicinal side chains was prepared by reaction of the dibromide 7 with silyl ether 8 ([Bu4N][Ph3SnF2]-catalysis) followed by Stille reaction of 9 with stannane 5. Acidic hydrolysis gave the triketo ester 11 that cyclized in a biomimetic-type reaction to the highly substituted dihydro benz[a]anthracene 12, a potential precursor of the angucyclinone landomycinone.
通过使二溴化物7与甲硅烷基醚8([Bu 4 N] [Ph 3 SnF 2 ]-催化)反应,然后使9与锡烷5进行Stille反应,制备具有两个邻位侧链的二甲氧基萘衍生物10。酸性水解使三酮酸酯11在仿生型反应中环化为高度取代的二氢苯并[ a ]蒽12,后者是古环素酮地霉素的潜在前体。