In the presence of triethylaluminum, oxyallyl anions derived from 2-allyloxybenzimidazoles react with aldehydes in highly regio-and stereoselective manner to afford α-adducts in good yields. The adducts are stereospecifically converted to cis-vinyloxiranes in good yields.
在
三乙基铝的存在下,源自2-烯丙氧基
苯并咪唑的氧烯丙基阴离子与
醛类反应,呈现出高度的区位选择性和立体选择性,获得良产率的α-加成物。这些加成物以立体专一的方式转化为良产率的顺式烯丙基亚氧化物。