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)。
Chemoselective reduction of a lactam carbonyl group in the presence of a gem-dicarboxylate by sodium borohydride and iodine: a facile entry to N-aryl trisubstituted pyrroles
作者:Pranab Haldar、Jayanta K Ray
DOI:10.1016/j.tetlet.2003.09.085
日期:2003.11
Several N-aryl γ-lactam gem dicarboxylates were chemoselectively reduced to cyclic amine diesters by using sodium borohydride–iodine system. The reduction in all cases was completed within 2.5 h after refluxing in THF. The cyclic amine products were isolated after aqueous (acidic) workup in good yields. Hydrolytic decarboxylation followed by dehydrogenation produced N-aryl carboethoxy pyrroles.