作者:Mark G. Moloney、John T. Pinhey
DOI:10.1039/p19880002847
日期:——
vinyl-lead compound (2), generated in this way, reacted rapidly with β-keto ester (5) to give the α-(E)-styryl derivative (6) in synthetically useful yield. This procedure for the α-vinylation of (5) has been applied to the divinytmercury compounds (7)–(13), and to the synthesis of the α-(E)-styryl β-dicarbonyl compounds (28), (30), (32), and (34). Compounds (6), (28), (30), (32), and (34). Compounds (6)
的处理(ë,ê)-distyrylmercury(1)与铅四乙酸,得到的混合物(ë)-styrylmercury乙酸酯(3)和(Ë) -苯乙烯基-三乙酸铅(2),其分解成(ë) -醋酸苯乙烯酯(4)和醋酸铅(II)。以这种方式产生的乙烯基铅化合物(2)与β-酮酸酯(5)迅速反应,以合成有用的产率得到α-(E)-苯乙烯基衍生物(6)。此程序用于(5)已用于二乙烯基汞化合物(7)-(13),以及α-(E)-苯乙烯基β-二羰基化合物(28),(30),(32)和(34)的合成。化合物(6),(28),(30),(32)和(34)。化合物(6),(28),(30),(32)和(34)也被通过与铅化合物(反应产生2通过下述物质反应生成的)三丁基- (ê)-styrylstannane(36)和四乙酸铅。分离相对稳定的环戊-1-烯基-三乙酸铅(21b),并使其与酮酯(5)反应,以定量获得化合物(18)