Synthesis of .beta.-Lactam Derivatives by Cycloaddition of 2-Methyleneazetidines with Azides
作者:Norbert De Kimpe、Marc Boeykens
DOI:10.1021/jo00097a021
日期:1994.9
In reaction with azides, substituted with electron-withdrawing groups, 2-methyleneazetidines underwent [3 + 2]-cycloaddition to, form intermediate triazolines. These intermediates spontaneously rearrange into four-membered cyclic amidines with concomitant loss of diazomethane.
De Kimpe Norbert, Boeykens Marc, J. Org. Chem, 59 (1994) N 18, S 5189-5191
作者:De Kimpe Norbert, Boeykens Marc
DOI:——
日期:——
SULMON, PAUL;DE, KIMPE NORBERT;SCHAMP, NICEAS, J. ORG. CHEM., 53,(1988) N 19, C. 4462-4465
作者:SULMON, PAUL、DE, KIMPE NORBERT、SCHAMP, NICEAS
DOI:——
日期:——
New synthesis of 2-methyleneaziridines and 2-methyleneazetidines by dimethyl titanocene mediated methylenation of α- and β-lactams
作者:Kourosch Abbaspour Tehrani、Norbert De Kimpe
DOI:10.1016/s0040-4039(00)00076-9
日期:2000.3
2-Methyleneaziridines and 2-methyleneazetidines were synthesized via a titanium mediated olefination procedure starting from the corresponding α-lactams and β-lactams.