Abstract
Carbon-carbon bond formation: A highly efficient method for the oxo-hetero-Diels-Alder reaction of 2-oxoindolin-3-ylidenes based on chiral calcium phosphate is described. In general, adducts were obtained with high yields and excellent diastereo- and enantioselectivities (up to 96 % yield, >99:1 endo/exo, >99 % ee; see scheme, Boc = tert-butoxycarbonyl).
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