Application of Chiral Sulfides to Catalytic Asymmetric Aziridination and Cyclopropanation with In Situ Generation of the Diazo Compound
作者:Varinder K. Aggarwal、Emma Alonso、Guangyu Fang、Marco Ferrara、George Hynd、Marina Porcelloni
DOI:10.1002/1521-3773(20010417)40:8<1433::aid-anie1433>3.0.co;2-e
日期:2001.4.17
aziridines and cyclopropanes (see scheme, PTC=phase-transfer catalyst, Ts=toluene-4-sulfonyl) in good yield with moderate to high d.r. and high ee values using tosylhydrazone salts with catalytic quantities of chiral sulfide (5-20 mol %) and metal catalyst (1 mol %). The process is particularly suited to the synthesis of conformationally locked cyclopropyl amino acids, which can now be prepared in only
亚胺和烯烃可以使用甲苯磺酰hydr盐催化催化转化,以良好的收率将其转化为相应的氮丙啶和环丙烷(参见方案,PTC =相转移催化剂,Ts =甲苯-4-磺酰基),并具有中等至高的dr和高ee值。手性硫化物(5-20mol%)和金属催化剂(1mol%)。该方法特别适合于构象锁定的环丙基氨基酸的合成,其现在仅需三步就可从市售材料中以100%ee的形式制备。