An efficient asymmetric cyclization reaction of amino-acid-derived isothiocyanates with azodicarboxylates is described. The chiral 1,2,4-triazolines are prepared in good yield (up to 87%) and enantioselectivities (up to 95% ee).
描述了
氨基酸衍生的异
硫氰酸酯与偶氮二
羧酸酯的有效不对称环化反应。制备的手性
1,2,4-三唑啉具有良好的收率(高达87%)和对映选择性(高达95%ee)。