DTBB-catalysed lithiation of 2,3-dichloropropene and related chloroamines: Synthetic applications
作者:Fernando F Huerta、Cecilia Gómez、Albert Guijarro、Miguel Yus
DOI:10.1016/0040-4020(95)00066-h
日期:1995.3
The reaction of 2,3-dichloropropene (1) and different carbonyl compounds (2) with an excess of lithium powder (1:7 molar ratio) in the presence of a catalytic amount of DTBB (5 mol %) in THF at 0°C leads, after hydrolysis with water, to the corresponding methylenic 1,4-diols 3 in a Barbier-type process. The cyclisation of diols 3 under acidic conditions (hydrochloric or phosphoric acid) yields the
2,3-二氯丙烯(1)和不同的羰基化合物(2)与过量的锂粉(摩尔比为1:7)在催化量的DTBB(5摩尔%)在THF中于0°下反应在水水解之后,C以Barbier型方法导致相应的亚甲基1,4-二醇3。在酸性条件下(盐酸或磷酸)将二醇3环化,得到相应的取代的亚甲基四氢呋喃4。最后,将2,3-二氯丙烯(1)转化为相应的烯丙基氯胺5,然后进行串联萘催化的2-锂化-S E。与不同的亲电试剂反应,提供相应的官能化胺7。对于含氧或硫的氯代烯丙基材料8,最后一个过程失败。