arylidene, and heteroarylidene malonates with tosylhydrazone salts in the presence of catalytic amount of Rh2(OAc)4 and triphenylarsine affords trans-2,3-disubstituted cyclopropane 1,1-dicarboxylic esters in high yields and high diastereoselectivities.
在温和条件下,在催化量的Rh 2(OAc)4和三苯基ar存在下,亚烷基,亚芳基和杂亚芳基
丙二酸酯与
甲苯磺酰hydr盐的反应可高收率获得反式-2,3-二取代的
环丙烷1,1-二
羧酸酯和非对映选择性高。