Sequential Nitromethane Conjugate Addition/Elimination−Pd-Catalyzed Allylation of β-Trifloxy Acrylates. Application to Carbapenem Synthesis
摘要:
[GRAPHICS]Sequential reactions of nitromethane via conjugate addition-elimination to beta-trifloxy acrylates followed by Pd-catalyzed substitution of the resulting allyl nitro compounds with nucleophiles afforded homologation products at the beta-position. 2-Naphthosultammethyl carbapenem, an anti-MRS carbapenem intermediate, was prepared in one pot from the corresponding 2-trifloxy compound. The scope and limitation of the one-pot method were investigated using several cyclic unsaturated esters and nucleophiles.
Sequential Nitromethane Conjugate Addition/Elimination−Pd-Catalyzed Allylation of β-Trifloxy Acrylates. Application to Carbapenem Synthesis
作者:John Y. L. Chung、Edward J. J. Grabowski、Paul J. Reider
DOI:10.1021/ol990299u
日期:1999.12.1
[GRAPHICS]Sequential reactions of nitromethane via conjugate addition-elimination to beta-trifloxy acrylates followed by Pd-catalyzed substitution of the resulting allyl nitro compounds with nucleophiles afforded homologation products at the beta-position. 2-Naphthosultammethyl carbapenem, an anti-MRS carbapenem intermediate, was prepared in one pot from the corresponding 2-trifloxy compound. The scope and limitation of the one-pot method were investigated using several cyclic unsaturated esters and nucleophiles.