Transformation of esters into allyl halides via substituted cyclopropanols. Application in the synthesis of (2S,3R,7R/S)-3,7-dimethyltridec-2-yl acetate and propionate, sex attractants of pine sawfly Diprion pini
作者:Andrey V. Bekish、Konstantin N. Prokhorevich、Oleg G. Kulinkovich
DOI:10.1016/j.tetlet.2004.05.022
日期:2004.6
A convenient new approach to the synthesis of the acetate and the propionate of (2S,3R,7R/S)-3,7-dimethyltridecan-2-ol, sex attractants of Diprion pini L., using the cyclopropanation of the ethoxycarbonyl group in O-THP protected ethyl (S)-lactate with ethylmagnesium bromide in the presence of titanium(IV) isopropoxide followed by C-2–C-3 cyclopropane ring opening as the key steps has been performed
一种方便的新方法,用于合成Diprion pini L.的性引诱剂(2 S,3 R,7 R / S)-3,7-二甲基三苯甲基-2-醇的乙酸酯和丙酸酯,在异丙醇钛(IV)存在下,O- THP用乙基溴化镁保护的O- THP保护的乳酸(S)-乳酸乙酯中的乙氧基羰基,随后进行了C-2-C-3环丙烷开环的关键步骤。