In view of the success of halogenated imines and electrophilic allyl halides as building blocks in synthetic organic chemistry, these compounds are promising substrates for the chiral synthesis of heterocyclic and carbocyclic beta-amino acids. In this project the asymmetric synthesis of new conformationally constrained beta-amino acid derivatives and analogues is developed based on Michael- and Mannich-additions and reactions of 1-azaallylic anions.