1,3-DIPOLAR CYCLOADDITIONS OF ETHOXYCARBONYL-NITRILE BENZYLIMINE, ETOOC C-N+-N- CH2C6H5, AND SYNTHESIS OF BETA-AMINO ACIDS - SYNTHESIS AND REACTIONS OF ETHYL 2-CHLORO-2-ETHOXYACETATE AND 2-CHLORO-2-ETHOXYACETYL CHLORIDE

The principles of 1,2-cyano-hydroxylation of olefins were applied to the preparation of 1,2-cyano-amines. The dipole component of this cycloaddition was nitrile imines, which formed pyrazolines with olefins. Ring cleavage was accomplished by thermolysis of 3-carboxypyrazolines, which gave 1,2-cyano-amines and subsequent hydrolysis gave beta-amino acids. The syntheses of the title reagents were described. Ethyl 2-chloro-2-ethoxy-acetate gave selectively oximes, hydrazones, nitrones, and phosphonium salts with hydroxylamine, hydrazines, N-substituted hydroxylamines and triphenylphosphine respectively. The phosphonium salt was used in a Wittig reaction with aldehydes to give alpha-ketoesters. Treatment of the acid chloride with allyl alcohols and subsequently with a monosubstituted hydroxylamine gave the allylic ester nitrone, which underwent intramolecular cyclization. Similarly, intramolecular cyclizations were carried out with the allylic ester - nitrile oxide and allylic ester - nitrile imine systems.