Asymmetric Synthesis of Cyclopropylamines Starting from <i>N</i>-Sulfinyl α-Chloro Ketimines
作者:Bram Denolf、Sven Mangelinckx、Karl W. Törnroos、Norbert De Kimpe
DOI:10.1021/ol0622054
日期:2007.1.1
of chiral N-(1-substituted cyclopropyl)-tert-butanesulfinamides in acceptable to good yields and diastereoselectivity via 1,3-dehydrohalogenation and subsequent addition of the Grignard reagent to the intermediate cyclopropylideneamine. Only in the case of allylmagnesium chloride did the reaction lead to aziridines in high yield. Further deprotection toward N-unprotected 1-substituted cyclopropylamines
用格氏试剂处理新的手性N-亚磺酰基α-氯代酮亚胺,通过1,3-脱卤代氢和随后加入N-(1-取代的环丙基)-叔丁烷亚磺酰胺以良好的收率和非对映选择性合成手性N-(1-取代的环丙基)-叔丁烷亚磺酰胺格氏试剂为中间体环亚丙基胺。仅在烯丙基氯化镁的情况下,该反应才以高产率产生氮丙啶。建立了对N-未保护的1-取代的环丙胺的进一步脱保护,并且确定了绝对构型。[反应:请参见文字]。