将水溶性手性二胺(S,S)-1,2-二苯基乙二胺二磺酸钠((S,S)-DPENDS)与钌膦配合物([RuCl_2(TPPTS)_2]_2)原位生成的催化剂用于催化水相中苄叉丙酮的不对称加氢反应.在优化条件下,羰基加氢产物4-苯基-3-丁烯-2-醇的选择性可达96.0%,对映选择性可达71.2%.经正己烷简单萃取后即可实现催化剂与加氢产物的分离,循环使用5次后,目标产物4-苯基-3-丁烯-2-醇选择性和对映选择性没有明显下降.
The asymmetric hydrogenation of benzalacctone catalyzed by ruthenium monophosphine complex RuCl_2(TPPTS)_2 [TPPTS =P(m-C_6H_4SO_3Na)_3] modified by (S,S)-DPENDS (disodium salt of sulfonated (S,S)-1,2-diphenyl-1,2-ethylene-diamine) was investigated in a water medium. Under the optimized conditions, a chemoselectivity of 96.0% for 4-phenyl-3-butene-2-ol and ee value of 71.2% were ob tained. The products could be easily obtained by simple extraction with n-hexane, and the catalyst could be reused five times without evident loss of catalytic activity and enantioselectivity.
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