C2-symmetric 1,2-diamine/copper(II) trifluoromethanesulfonate complexes as chiral catalysts. Asymmetric cyclopropanations of styrene with diazo esters
作者:Shuji Kanemasa、Satoshi Hamura、Etsuko Harada、Hidetoshi Yamamoto
DOI:10.1016/0040-4039(94)80029-4
日期:1994.10
Styrene and diazo esters react in the presence of copper(II) trifluoromethanesulfonate (1 mol%) and (1S,2S)-N,N′-di(mesitylmethyl)-1,2-diphenyl-1,2-ethanediamine (2 – 3 mol%) to give 2-phenyl-1-cyclopropanecarboxylates in good to excellent optical yields. This reaction has been applied tov the synthesis of chrythanthemic acid.
苯乙烯和重氮酯在三氟甲磺酸铜(II)(1 mol%)和(1S,2S)-N,N'-二(间苯甲基)-1,2-二苯基-1,2-乙二胺(2 – 3mol%)以良好至优异的光学产率得到2-苯基-1-环丙烷羧酸酯。该反应已应用于菊酸的合成。