2-Substituted 1,3-dithianes were subjected to lithiation by n-BuLi at room temperature and the resulting anions reacted with 1,2-disubstituted epoxides at room temperature, giving the coupling products in satisfactory yield. In addition, a mixed organometallic reagent, n-BuLi/Bu2Mg, was found to be an effective metallation reagent for 2-substituted-1,3-dithianes.
2 取代的
1,3-二噻烷在室温下被 n-BuLi
锂化,产生的阴离子在室温下与 1,2-二取代的
环氧化物反应,得到的偶联产物收率令人满意。此外,还发现一种混合有机
金属试剂 n-BuLi/Bu2Mg,是 2-取代-
1,3-二噻烷的有效
金属化试剂。