Photocatalytic Asymmetric Epoxidation of Terminal Olefins Using Water as an Oxygen Source in the Presence of a Mononuclear Non-Heme Chiral Manganese Complex
作者:Duyi Shen、Claudio Saracini、Yong-Min Lee、Wei Sun、Shunichi Fukuzumi、Wonwoo Nam
DOI:10.1021/jacs.6b10836
日期:2016.12.14
epoxidation of terminal olefins using a mononuclear non-heme chiral manganese catalyst, [(R,R-BQCN)MnII]2+, and water as an oxygen source yields epoxides with relatively high enantioselectivities (e.g., up to 60% enantiomeric excess). A synthetic mononuclear non-heme chiral Mn(IV)-oxo complex, [(R,R-BQCN)MnIV(O)]2+, affords similar enantioselectivities in the epoxidation of terminal olefins under stoichiometric
On the origin of 1,5-induction in tin(IV) halide-promoted reactions of 4-alkoxyalk-2-enylstannanes with aldehydes
作者:Lindsay A. Hobson、Mark A. Vincent、Eric J. Thomas
DOI:10.1039/a800781k
日期:——
A combination of experiment and theory has identified both the allyltin trichlorides 3 (R2 = Bn, H) as key intermediates in tin(IV) chloride-promoted reactions of allylstannanes 1 (R2 = Bn, H) and the transition structures that are involved in their reactions with aldehydes.