Chemistry of insect antifeedants from azadirachta indica (part 8): Synthesis of hydroxydihydrofuran acetal fragments for biological evaluation and azadirachtin total synthesis studies.
作者:James C. Anderson、Steven V. Ley、Dinos Santafianos、Richard N. Sheppard
DOI:10.1016/s0040-4020(01)82332-2
日期:1991.8
hydroxydihydrofuran acetal fragments (2) (3) and (45) common to the potent insect antifeedant and growth disruption agent azadirachtin (1). These units, along with other analogues, were prepared for biological evaluation as antifeedants. Furthermore, several potential coupling fragments (51), (52), (54), (55), (62), (63) and (56) for azadirachtin synthesis were also prepared from common precursors. Methods
这项工作描述了制备强效抗昆虫饲料和生长破坏剂印za素(1)共有的模型羟基二氢呋喃缩醛片段(2)(3)和(45)的统一策略。这些单元以及其他类似物已准备作为拒食剂用于生物学评估。此外,几个潜在的偶联片段(51),(52),(54),(55),(62),(63)和(56))印ach素的合成也由普通的前体制备。已开发出方法来制备对映体纯形式的这些材料,并在合成后期方便地保护有角度的羟基并揭露不稳定的烯醇双键。