Functionalized chloroenamines in aminocyclopropane synthesis - VI. Chlorotetrahydropyridines as a basis for the synthesis of 3-azabicyclo[3.1.0.]hexane derivatives
isolated as pure substances. Two equivalents of 9 afforded the dichloroenamines 12a,c from 8a,c. Interaction of the chlorinated enamines 10a-e and 12a,c with cyanide gave morpholino-azabicyclohexane derivatives. 10a-d, thereby, led to exo-cyano-isomers lla-c; 12a,c generated endo-cyano compounds 13a,c. In the case of the ethoxycarbonylated chloroenamine 10e a mixture of diastereomeric products 11e and 14e