作者:Fernando F Huerta、Cecilia Gómez、Miguel Yus
DOI:10.1016/0040-4020(96)00798-3
日期:1996.10
The reaction of N,N-disubstituted (E)-4-amino-1-chloro-2-butenes 1 with an excess of lithium and a catalytic amount of DTBB in the presence of an electrophile [E+ = ButCHO, PhCHO, Me2CO, (CH2)5CO, (c-C3H5)2CO, Me3SiCl] in THF at −78°C leads, after hydrolysis with water, to the expected mixture of 1,2- and 1,4- disubstituted compounds (2 and 3, respectively), which could be easily separated by flash
的反应Ñ,Ñ二取代(ê)-4-氨基-1-氯-2-丁烯1与过量锂和DTBB的亲电子[E的存在催化量+ =卜吨CHO,苯甲醛,在-78°C下于THF中的Me 2 CO,(CH 2)5 CO,(c -C 3 H 5)2 CO,Me 3 SiCl]在水中水解后,得到预期的1,2-混合物和1,4-二取代的化合物(2和3,分别),可通过快速色谱法轻松分离。当将反应应用于相应的(Z)-起始原料或应用于(Z)-或(E)-氧或含硫的氯化2-丁烯时,其收率要低于硝化前体的收率。