Preparation of β-aminoesters from ketene silyl acetals and N-(alkylamino)benzotriazoles
作者:Alan.R. Katritzky、N. Shobana、Philip A. Harris
DOI:10.1016/s0040-4039(00)94482-4
日期:1990.1
A wide variety of β-aminoesters are prepared in good yields by the reaction of lithium ester enolates derived from ketene silyl acetals with N-(alkylamino)benzotriazoles. The secondary β-aminoesters readily cyclize to β-lactams (2-azetidinones) on deprotonation.
KATRITZKY, ALAN R.;SHOBANA, N.;HARRIS, PHILIP A., TETRAHEDRON LETT., 31,(1990) N8, C. 3999-4002
作者:KATRITZKY, ALAN R.、SHOBANA, N.、HARRIS, PHILIP A.
DOI:——
日期:——
Synthesis of 2,3-Dihydro-4(1H)-quinolones and the Corresponding 4(1H)-Quinolones via Low-Temperature Fries Rearrangement of N-Arylazetidin-2-ones
作者:Jens Lange、Alex C. Bissember、Martin G. Banwell、Ian A. Cade
DOI:10.1071/ch10465
日期:——
cyclization processes, undergo smooth Fries-rearrangement in triflic acid at 0–18°C to give the isomeric 2,3-dihydro-4(1H)-quinolones (2). Dehydrogenation of the latter compounds using 10% Pd on C in 1.0 M aqueous sodium hydroxide/propan-2-ol mixtures at ca. 82°C provides the corresponding 4(1H)-quinolones (3).