methylenecyclobutane with the aid of Et3Al in the presence of Cp2ZrCl2 leading to 6-ethyl-6-aluminaspiro[3.4]octane has been realized. The latter, without isolation, was converted into spiro[3.3]heptane, 6-thiaspiro[3.4]octane and also spiro[3.4]octan-6-ol and 6-spiro[3.4]octyl formate with high yields and selectivity.
首次实现了在Cp 2 ZrCl 2存在下借助于Et 3 Al环环
亚甲基环丁烷,生成6-乙基-6-铝螺并[3.4]
辛烷。后者未经分离就以高收率和选择性被转化成螺[3.3]
庚烷,6-
硫杂
螺[3.4]辛烷以及
螺[3.4]辛烷6-醇和6-螺[3.4]辛基
甲酸。