Tetralone Esters as Intermediates for the Synthesis of Podophyllotoxin Derivatives Via Cyclopropanation of Chalcones
作者:N. Nanjundaswamy、S. Shashikanth、C. Anjanamurthy、K. M. Lokanatha Rai
DOI:10.1080/00397910008087138
日期:2000.4
Abstract Cyclopropyl ester (8a-f) were synthesized by the cyclopropanation of chalcones (7a-e) in dry benzene using powdered sodium in 80-85% yield. Preparation of tetralone ester (4a-e), an intermediate for the synthesis of podophyllotoxin derivatives by Lewis acid (SnCl4) catalyzed cyclization of (8a-e) is also described here.
摘要 环丙酯 (8a-f) 是通过在干燥苯中使用粉状钠以 80-85% 的产率通过查耳酮 (7a-e) 的环丙烷化反应合成的。此处还描述了四氢萘酮酯 (4a-e) 的制备,这是一种通过路易斯酸 (SnCl4) 催化环化 (8a-e) 合成鬼臼毒素衍生物的中间体。