Enantioselective Synthesis of the AB-Ring System of the Antitumor Antibiotic Tetrazomine
作者:Peter Wipf、Corey R. Hopkins
DOI:10.1021/jo015512q
日期:2001.5.1
4-tetrahydroisoquinoline moiety of tetrazomine was accomplished in 18 steps and in 3% overall yield from commercially available o-anisaldehyde. The reaction sequence utilizes a Sharpless asymmetric dihydroxylation to install the stereocenter and an intramolecular Friedel--Crafts hydroxyalkylation with an N-protected 2-oxo-acetamide to close the heterocyclic ring.
四唑胺的1,2,3,4-四氢异喹啉部分的合成以18个步骤完成,从市售邻茴香醛中的总收率为3%。反应序列利用Sharpless不对称二羟基化反应来安装立体中心,并利用N-保护的2-氧代乙酰胺进行分子内Friedel-Crafts羟烷基化反应以封闭杂环。