A direct method for the preparation of tertiary 3-amino-propenones and 3-aminopropenoates from β-diketones and β-keto esters, and secondaryamines has been developed. The reaction is performed without solvent in the presence or absence of Lewis acid as catalyst, depending on the reactivity of both the amine and the diketo substrate.
Reactions of per(poly)-fluoroalkanesulfonyl azides with β-ketoester enamines, a new route to N-per(poly) fluoroalkanesulfonyl amidines
作者:Yong Xu、Yanli Wang、Shizheng Zhu
DOI:10.1016/s0022-1139(00)00244-x
日期:2000.7
Per(poly)-fluoroalkanesulfonyl azides reacted readily with beta-ketoester enamines to afford good yields of N-per(poly)-fluoro-alkanesulfonyl amidines and diazoacetates. Similarly, treatment of the azides with the cycle analogues ethyl 2-(1-morpholine) 1-cyclopentenecarboxylate gave amidines containing diazo groups. The reaction mechanisms and solvent effects are discussed. (C) 2000 Elsevier Science S.A. All rights reserved.