A Convenient Synthesis of Tricyclic Gamma-Lactams, Simulating B-C-D Rings of Azasteroids Via Michael Addition Reaction
摘要:
Cinnamoylchloride on treatment with arylaminomalonates produced the gamma-lactam diester derivatives. Highly stereoselective hydrolysis of the diester, produced the trans acid, which on homologation by Arndt-Eistert's method followed by PPA cyclization generated the tricyclic gamma-lactam derivatives simulating B-C-D ring of many azasteroids in good overall yield.
Synthesis of some thieno gamma lactam monocarboxylic acids with high antibacterial activity: A new look at an old molecular system
作者:Gandhi K. Kar、Bidhan C. Roy、Sujit Das Adhikari、Jayanta K. Ray、Nitosh K. Brahma
DOI:10.1016/s0968-0896(98)80015-1
日期:1998.12
Synthesis and antibacterial activity of some novel monocyclic thienyl gamma lactams are reported. The compounds have been synthesized by a two-step process consisting of, first, intermolecular Michael addition, followed by intramolecular amidification between suitable arylamino malonate and 3-(2'-thienyl) acryloyl chloride and then hydrolysis cum in situ decarboxylation of the diacid. The compounds