New synthetic approach to pyrroloiminoquinone marine alkaloids. Total synthesis of makaluvamines A, D, I, and K
作者:Masatomo Iwao、Osamu Motoi、Tsutomu Fukuda、Fumito Ishibashi
DOI:10.1016/s0040-4020(98)00543-2
日期:1998.7
A new entry into pyrroloiminoquinone marine alkaloids, makaluvamines, has been developed. The key 1,3,4,5-tetrahydropyrrolo[4,3,2-de]quinoline intermediates 11 and 18 were prepared by aryne-mediated cyclization of the 4-chloro-6-methoxytryptamine derivatives 10 and 17, respectively. The requisite substituents at the indole 4- and 3-positions of 10 and 17 were efficiently assembled by sequential use
已开发出一种新的进入吡咯烷氨基醌海洋生物碱,Makaluvamines。关键的1,3,4,5-四氢吡咯并[4,3,2- de ]喹啉中间体11和18分别通过芳烃介导的4-氯-6-甲氧基色胺衍生物10和17环化而制得。通过依次使用1-三异丙基甲硅烷基-6-甲氧基胍(6)的定向锂化反应和氟离子诱导的4-甲硫基的消除加成反应,可以有效地组装10和17的吲哚4和3位上的必需取代基。氯-1-三异丙基甲硅烷基-6-甲氧基甘氨酸(7)是关键反应。