SCHOTT G.; ENGELBRECHT L., Z. CHEM., 1978, 18, NO 12, 457-458
作者:SCHOTT G.、 ENGELBRECHT L.
DOI:——
日期:——
Evidence and isolation of tetrahedral intermediates formed upon the addition of lithium carbenoids to Weinreb amides and N-acylpyrroles
作者:Laura Castoldi、Wolfgang Holzer、Thierry Langer、Vittorio Pace
DOI:10.1039/c7cc05215d
日期:——
The tetrahedralintermediates generated upon the addition of halolithium carbenoids (LiCH2X and LiCHXY) to Weinreb amides have been intercepted and fully characterized as O-TMS heminals. The commercially available N-trimethylsilyl imidazole is the ideal trapping agent whose employment, combined with a straightforward neutral Alox chromatographic purification, enables the isolation of such labile species