Novel P*- and P-monodentate phosphoramidites of a 1,3,2-dioxaphosphepine series were derived from (S a)-3-trimethylsilyl-BINOL, (R,S)-semi-TADDOL, and (R,R)-TADDOL. Catalytic performance of the synthesized compounds were examined in the Pd-catalyzed asymmetric allylic substitution of (E)-1,3-diphenylallyl acetate: the reaction with dimethyl malonate gave up to 92% ee. The effects of additives of 5,10,15,20-tetraphenylporphyrin and its metal complexes on conversion and enantioselectivity were studied.
从(S a)-3-三甲基
硅基-BINOL、(R,S)-半 TADDOL 和 (R,R)-TADDOL 衍生出了 1,3,2- 二氧
磷杂
菲系列的新型 P*- 和 P- 单齿
磷酰胺。在 Pd 催化的(E)-1,3-二苯基
烯丙基乙酸酯的不对称烯丙基取代反应中,考察了合成化合物的催化性能:与
丙二酸二甲酯反应的ee高达 92%。研究了 5,10,15,20-
四苯基卟啉及其
金属复合物添加剂对转化率和对映体选择性的影响。