Cyclopropylmethyl- and cyclobutylmethyllithium by an arene-catalyzed lithiation. Stability and reactivity
作者:Itziar Peñafiel、Isidro M. Pastor、Miguel Yus
DOI:10.1016/j.tet.2010.02.090
日期:2010.4
presence of different carbonyl compounds as electrophiles, in THF at −78 °C leads, after hydrolysis, to the corresponding cycloalkyl alcohols 6 and 9, respectively. However, when the same starting materials are lithiated using naphthalene as catalyst in diethyl ether and at higher temperature (0 or 25 °C), and then react with the same electrophiles, the final hydrolysis yields the corresponding unsaturated
在不同的羰基化合物作为亲电试剂的情况下,在-78°C的THF中,(氯甲基)环丙烷5和(溴甲基)环丁烷8与锂和亚化学计量的DTBB的反应在水解后导致相应的环烷基醇分别为6和9。然而,当使用萘作为催化剂在乙醚中并在较高温度(0或25°C)下对相同的起始原料进行锂化,然后与相同的亲电试剂反应时,最终水解分别产生相应的不饱和醇7和10。