A C 2 -symmetric sulfide 6 has been synthesized from cheap L-tartaric acid. It was found that sulfide 6 could perform a tandem reaction with benzyl bromide and tosyl imines to give (2S,3S)-aziridines 9a-9g with good to excellent enantioseletivities (up to 96% ee).
AC 2 -对称硫化物6已由廉价的L-酒石酸合成。发现硫化物 6 可以与苄基溴和甲苯磺酰亚胺进行串联反应,得到 (2S,3S)-氮丙啶 9a-9g,具有良好至极好的对映选择性(高达 96% ee)。
PROCESS FOR THE PREPARATION OF AN OXIRANE, AZIRIDINE OR CYCLOPROPANE