Synthesis and Selective<i>N</i>,<i>O</i>-Functionalization of Pyrazolone-Fused 3-Aminoazepinones
作者:Ben Schurgers、Guy Van Lommen、Guido Verniest
DOI:10.1002/ejoc.201500122
日期:2015.6
A new class of pyrazolone-fused 3-amino-1,3,4,7-tetrahydro-2H-azepin-2-ones was synthesized from azepane-based α,β-unsaturated esters. The latter compounds were obtained efficiently from 2-Cbz-amino-N-(2-bromoallyl)-4-pentenamide derivatives through initial Pd-catalyzed methoxycarbonylation followed by ring-closing metathesis. These new 3-aminotetrahydroazepinone esters were condensed with hydrazine
Rapid Synthesis of 1,3,4,4-Tetrasubstituted β-Lactams from Methyleneaziridines Using a Four-Component Reaction
作者:Claire C. A. Cariou、Guy J. Clarkson、Michael Shipman
DOI:10.1021/jo801664g
日期:2008.12.19
Graphics2-Methyleneaziridines can be transformed into a variety of 1,3,4,4-tetrasubstituted beta-lactams in moderate to good yields (46-63%) via a "one-pot" process that brings together four components with the formation of three new intermolecular carbon-carbon bonds.
MORI, M.;BAH, YOSHIO, HETEROCYCLES, 1985, 23, N 2, 317-323