All articles of this category Lewis acid promoted Michael addition of 2-(trimethylsilyloxy)furan to 3-[( E )-2-butenoyl]-1,3-oxazolidin-2-one ( 2 ) was examined. A 1:1 complex prepared from scandium triflate and 3,3'-bis(diethylaminomethyl)-1,1'-bi-2-naphthol 5b in situ showed excellent anti -selectivity and moderate enantioselectivity, while Cu(II)-bis(oxazolines) complex exhibited excellent enantioselectivity and moderate to good anti -selectivity. asymmetric Michael addition - scandium(III) triflate - binaphthol derivative - bis(oxazolines)
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Kitajima et al. (1997) studied this question.