作者:Javier Ortiz、Albert Guijarro、Miguel Yus
DOI:10.1002/(sici)1099-0690(199911)1999:11<3005::aid-ejoc3005>3.0.co;2-7
日期:1999.11
Reaction of the N-(α-chloroalkyloxycarbonyl)pyrrolidines 1 with lithium powder and a catalytic amount of 4,4′-di-tert-butylbiphenyl (DTBB, 2.5 mol-%) in the presence of different electrophiles [iBuCHO, tBuCHO, PhCHO, Et2CO, (CH2)5CO, PhCOMe, Ph2CO, Me3SiCl], in THF at temperatures ranging between –78 and –60°C leads, after hydrolysis with water, to the expected functionalized carbamates 2. Deprotection
所述的反应ñ - (α-chloroalkyloxycarbonyl)吡咯烷1与锂粉末和催化量的4,4'-二-叔-在不同亲电[存在丁基联苯(DTBB,2.5摩尔%)我BuCHO,吨BuCHO ,PhCHO,Et 2 CO,(CH 2)5 CO,PhCOMe,Ph 2 CO,Me 3 SiCl]在THF中在–78至–60°C的温度范围内用水水解后,导致预期的官能化氨基甲酸酯2。化合物的脱保护2由羰基化合物衍生而来,与氢氧化锂在80°C的乙醇和水的混合物中提供相应的1,2-二醇3。