Phase-transfer catalysed (PTC) reactions of 1,1-dichloro-2-cyanocyclopropane with nucleophiles. Identification of intermediates
作者:Andrzej Jończyk、Tomasz Koćmierowski、Tadeusz Zdrojewski
DOI:10.1039/b205995a
日期:2003.1.20
addition–elimination mechanism for PTC reactions of phenols with 1,1-dichloro-2-cyanocyclopropane (1) is supported by trapping of intermediate cyclopropenes 3 and 5. PTC reactions of 1 with a series of phenols 2a–d, thiophenol (2e), alcohols 2f,g and dithioles 11a,b led to formation of disubstituted cyanocyclopropanes 6a–d, 6e, 6f,g or spiroproducts 12a,b, respectively. Under acidic conditions or thermally, d
PTC反应的加成-消除机理 酚类 和 1,1-二氯-2-氰基环丙烷(1)被中间物捕获所支撑。环丙烯 3和5。1的PTC反应与一系列酚类 图2a - ð,苯硫酚(2e),酒类 2f,g和二硫 11a,b导致分别形成双取代的氰基环丙烷6a - d,6e,6f,g或螺产物12a,b。在酸性条件下或在热条件下,将二烷氧基环丙烷6f,g或螺环烷12a转化为3-氰基丙酸烷基酯10f,g和乙烯酮二硫缩醛13a。