Free radical annulation in the synthesis of bicyclic .beta.-lactams. 4. Exo vs. endo cyclizations in the construction of the (.+-.)-1-oxacepham and (.+-.)-1-oxahomocepham systems
The synthesis and reactivity of novel azetidinyl enediynes
作者:Amit Basak、Uttam Kumar Khamrai、Uttam Mallik
DOI:10.1039/cc9960000749
日期:——
Novel bicyclic azetidinyl enediynes 1 and 2 are synthesized via Pd0 catalysed coupling followed by N-alkylation; their thermal properties are also evaluated.
Free radical annulation in the synthesis of bicyclic .beta.-lactams. 4. Exo vs. endo cyclizations in the construction of the (.+-.)-1-oxacepham and (.+-.)-1-oxahomocepham systems
作者:Mario D. Bachi、Felix Frolow、Christian Hoornaert
DOI:10.1021/jo00159a010
日期:1983.6
ARNOLDI, ANNA;CABRINI, ROSA MARIA;FARINA, GANDOLFINA;MERLINI, LUCIO, J. AGR. AND FOOD CHEM., 38,(1990) N2, C. 2197-2199
作者:ARNOLDI, ANNA、CABRINI, ROSA MARIA、FARINA, GANDOLFINA、MERLINI, LUCIO
DOI:——
日期:——
4-Benzoyloxy-2-azetidinone, a Convenient Synthon for β - Lactam Intermediates
作者:Amit Basak、Uttam Khamrai
DOI:10.1080/00397919408013810
日期:1994.1
4 - Heterosubstituted - 2 - azetidenones were prepared in excellent yields from 4 - benzoyloxy - 2 - azetidenone(4), a much cheaper and stabler substrate compared to more common 4 - acetoxy - 2 - azetidenone (2).
Design, synthesis and biological activity of novel enediynyl monocyclic β-lactams
作者:Amit Basak、Uttam Kumar Khamrai
DOI:10.1016/0040-4039(96)00297-3
日期:1996.4
Monocyclicβ-lactams 1–3 substituted at C-4 with enediyne moiety have been synthesized via Pd(0) mediated coupling reaction. Their antibacterial activity against ampicillin-resistant E. coli have been tested.