Synlett p. 568 - 570 (1997)
Update date:2022-07-30
Topics:
Kitajima, Hiroshi
Katsuki, Tsutomu
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.
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Doi:10.1016/j.tet.2017.06.043
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