摘要:
Isoxazolidine and dihydropyran spiro derivatives can be easily transformed, by hydrolysis and hydrogenolysis, to give delta-keto esters, delta-keto acids, beta-amino esters, beta-amino acids and 3-amino alcohols in good yields, Starting from optically active compounds enantiomerically pure products are obtained, In some cases, reactions were induced by microwave irradiation.