Arene-catalysed lithiation of triflates and triflamides under barbier-type conditions: An indirect transformation of alcohols and amines into organolithium compounds
作者:Emma Alonso、Diego J Ramón、Miguel Yus
DOI:10.1016/0040-4020(96)00886-1
日期:1996.11
The reaction of alkyl triflates 1 or allyl or benzyl triflamides 3 with an excess of lithium powder and a catalytic amount of naphthalene (4 mol %) in the presence of different electrophiles [Me3SiCl, PriCHO, ButCHO, PhCHO, 4-MeOC6H4CHO, CH3(CH2)6CHO, Et2CO, (CH2)5CO, (c-C3H5)2CO, PhCOMe, 4-MeC6H4COPh, PhCH=NPh, n-C8H7CON(CH2)4] in THF at temperature ranging between −78 and 0°C leads, after hydrolysis
烷基三氟甲磺酸酯的反应1或烯丙基或苄基triflamides 3在不同的亲电子[我的存在下用过量的锂粉末和萘的催化量的(4摩尔%)3的SiCl,镨我CHO,卜吨CHO,苯甲醛, 4-MeOC 6 H 4 CHO,CH 3(CH 2)6 CHO,Et 2 CO,(CH 2)5 CO,(c -C 3 H 5)2 CO,PhCOMe,4-MeC 6 H 4 COPh,PhCH = NPh,n -C在-78至0°C之间的温度下,在THF中的8 H 7 CON(CH 2)4 ]导致水解后生成相应的缩合产物2。当将α,β-不饱和羰基化合物用作亲电子化合物时,取决于所使用的亲电子试剂,发生1,2-(2-环己烯酮)或1,4-加成(肉桂醛或亚苄基丙酮)。