作者: J�rgen Weidner , Elmar Vilsmaier , Claudia Henn
DOI: 10.1007/BF00811288
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摘要: Reaction of HexahydroazepinobicycloalkylMeldrum's acid7 Ba-7 Bd or PiperidinocyclopropylMeldrum's Ce withMeldrum's acid (1) generates cyclopropanes possessing two isopropylidene malonate moieties. In the solid state bicyclic derivatives were found to be dienolic compounds11 a-11 d, whereas monocyclic system has tetracarbonyl structure10e. 7a-7d, starting materials for synthesis of11 obtained from1 and O,N-acetal4B aminal6B.