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.
Indium-mediated Substitution of 4-Acetoxy-2-azetidinones: Synthesis of 4-Allyl-2-azetidinones
作者:Suk-Ku Kang、Tae-Gon Baik、Xiang-Hua Jiao、Kyong-Ju Lee、Cheol Hae Lee
DOI:10.1055/s-1999-2652
日期:1999.4
Indium-mediated allylation of 4-acetoxy-2-azetidinones with indium and allylic bromides in the presence of potassium iodide in DMF at room temperature afforded 4-allyl-substituted azetidinones under mild conditions in good yields.