Dirhodium(II) tetrakis[ N-tetrachlorophthaloyl-( S)- tert-leucinate], Rh 2( S-TCPTTL) 4, is an exceptionally effective catalyst for enantioselective tandem carbonyl ylide formation-cycloaddition reactions of 2-diazo-3,6-diketoesters with arylacetylene, alkoxyacetylene, and styrene dipolarophiles, providing cycloadducts in good to high yields and with enantioselectivities of up to 99% ee as well as
四(N-四
氯邻苯二甲酰基-(S)-叔亮
氨酸酯)
铑(II)Rh 2(S-
TCPTTL)4是对2-重氮-3,6对映选择性串联羰基内酯形成-环加成反应的非常有效的催化剂-二
酮酸酯与芳基
乙炔,烷氧基
乙炔和
苯乙烯双极性亲和剂,提供高至高收率的对映体加成物,对映选择性高达99%ee,并且对
苯乙烯具有完美的非对映非对映选择性。