Novel Synthesis of Carbapenam by Intramolecular Attack of Lactam Nitrogen toward η<sup>1</sup>-Allenyl and η<sup>3</sup>-Propargylpalladium Complex
作者:Yuji Kozawa、Miwako Mori
DOI:10.1021/jo030123c
日期:2003.10.1
When a THF solution of beta-lactam having propargyl phosphate was warmed in the presence of 5 mol % of Pd-2(dba)(3).CHCl3, 20 mol % of a bidentate ligand, and sodium acetate (1.5 equiv) at 40 degreesC for 22 h, carbapenam was produced in high yield. In this reaction, the lactam nitrogen attacked the central carbon of a eta(3)-propargylpalladium complex, which was formed from propargyl phosphate and Pd(0).
From penicillin to penem and carbapenem. VI1)
作者:Katsumi Fujimoto、Yuji Iwano、Koichi Hirai
DOI:10.1016/s0040-4039(00)98475-2
日期:1985.1
Carbapenem and penem antibiotics. V. Carbapenem and penem antibiotics. VI. Synthesis and antibacterial activity of 2-heteroaromatic-thiomethyl and 2-carbamoyloxymethyl 1-methylcarbapenems.
作者:Mitsuru IMUTA、Hikaru ITANI、Hisao ONA、Yoshinori HAMADA、Shoichiro UYEO、Tadashi YOSHIDA
DOI:10.1248/cpb.39.663
日期:——
chain, are described. The introduction of a methyl substituent at the C-1 position was accomplished by a newly developed procedure using crotyl halides and zinc dust. The 2-hydroxymethyl carbapenems as key intermediates allowed an easy entry into the preparation of title carbapenems.