A Convenient Synthesis of Tricyclic Gamma-Lactams, Simulating B-C-D Rings of Azasteroids Via Michael Addition Reaction
摘要:
Cinnamoylchloride on treatment with arylaminomalonates produced the gamma-lactam diester derivatives. Highly stereoselective hydrolysis of the diester, produced the trans acid, which on homologation by Arndt-Eistert's method followed by PPA cyclization generated the tricyclic gamma-lactam derivatives simulating B-C-D ring of many azasteroids in good overall yield.
NaBH4-I2 mediated chemoselective reduction of γ-lactam and thio-γ-lactam in presence of gem-dicarboxylates: An easy access to 1,3-diaryl pyrrolidines
作者:Gopa Barman、Pranab Haldar、Neelanjan Dutta、Jayanta K. Ray
DOI:10.1002/jhet.542
日期:2011.3
Substituted pyrrolidine derivatives were synthesized in high yield by NaBH4/I2 mediatedchemoselectivereduction of N‐aryl‐γ‐lactam and N‐aryl‐thio‐γ‐lactam‐2,2‐dicarboxylate. With excess NaBH4/I2, carbonyl functionality of the ester groups remained unchanged. J. Heterocyclic Chem., (2011).
NaBH 4 / I 2介导的N-芳基-γ-内酰胺和N-芳基-硫代-γ-内酰胺-2,2-二羧酸酯的化学选择性还原以高收率合成了取代的吡咯烷衍生物。在过量的NaBH 4 / I 2下,酯基的羰基官能度保持不变。J.杂环化学。(2011)。
作者:Ghosh, Malay、Kar, Gandhi K. Ray, Jayanta K.、Chatterjee, Basanta G.
DOI:——
日期:——
Kar, Gandhi K.; Ramesh, Dandala; Chatterjee, Basanta G., Journal of Chemical Research, Miniprint, 1997, # 3, p. 568 - 583
作者:Kar, Gandhi K.、Ramesh, Dandala、Chatterjee, Basanta G.、Ray, Jayanta K.
DOI:——
日期:——
NaBH<sub>4</sub>−InCl<sub>3</sub>-Mediated One-Pot Chemo- and Stereoselective Decarboxylative Reduction of α-Aza <i>g</i><i>em</i>-Dicarboxylic Esters to Monoalcohols
作者:Pranab Haldar、Jayanta K. Ray
DOI:10.1021/ol051453h
日期:2005.9.1
graph The combination of NaBH4 and a catalytic amount of InCl3 provides a one-pot method for chemo- and stereoselective decarboxylative reduction of gem-dicarboxylic esters 1 to monoalcohols 2 in the presence of the lactam carbonyl in refluxing acetonitrile under inert atmosphere.
GHOSH, M.;KAR, G. K.;RAY, J. K.;CHATTERJEE, B. G., SYNTH. COMMUN., 1983, 13, N 8, 667-675
作者:GHOSH, M.、KAR, G. K.、RAY, J. K.、CHATTERJEE, B. G.