Di(lithiomethyl)benzenes from di(chloromethyl)benzenes by a DTBB-catalysed lithiation under Barbier-type conditions
作者:Cecilia Gómez、Fernando F Huerta、Miguel Yus
DOI:10.1016/s0040-4020(97)00878-8
日期:1997.10
The reaction of 1,2-, 1,3- and 1,4-di(chloromethyl)benzenes (1a-c) and different electrophiles [PriCHO, ButCHO, PhCHO, (CH2)5CO, PhCOMe, Me3SiCl] with an excess of lithium powder and a catalytic amount of DTBB (4 mol%) in THF at 0°C leads, after hydrolysis with water, to the expected dioles or disilylated compounds 2aa-cf.
的1,2-反应,1,3-和1,4-二(氯甲基)苯(1A-1C不同)和亲电[镨我CHO,卜吨CHO,苯甲醛,(CH 2)5 CO,PhCOMe,用水过量水解后,在0℃下,具有过量锂粉和DTBB(4 mol%)催化量的DTBB(4 mol%)的Me 3 SiCl]导致预期的二醇或二甲硅烷基化化合物2aa-cf。