Base-catalyzed reaction between isatins and N-Boc-3-pyrrolin-2-one
作者:Naresh Ramireddy、John C.-G. Zhao
DOI:10.1016/j.tetlet.2013.11.118
日期:2014.1
The base-catalyzed reactionbetweenisatins and N-Boc-3-pyrrolin-2-one yields Morita–Baylis–Hillman (MBH) adducts instead of the expected aldol products in good to high yields (up to 97%). Various organic and inorganic bases are efficient catalysts for this reaction. Our study excluded the Morita–Baylis–Hillman mechanism for the formation of the MBH-type products. The MBH products are most likely formed
The title compound, C17H22N2O4, is a linked bis-chromophore. An X-ray structure determination confirmed the restricted rotation of the alicyclic chain segment as suggested by H-1 NMR spectroscopic results in solution.
US4855444A
申请人:——
公开号:US4855444A
公开(公告)日:1989-08-08
US4962204A
申请人:——
公开号:US4962204A
公开(公告)日:1990-10-09
Synthesis and Photochemistry of 5,5-Dimethyl-1H-pyrrol-2(5H)-one and of SomeN-Substituted Derivatives
作者:Andreas Ihlefeld、Paul Margaretha
DOI:10.1002/hlca.19920750435
日期:1992.6.24
In two steps, 5,5-dimethyl-1H-pyrrol-2(5H)-one (3a) was prepared from 5,5-dimethylpyrrolidine-2,4-dione ( = dimethyltetramic acid; 4) in 71% overall yield (Scheme 1) and further converted to N-substituted derivatives 3b–fvia acylation, alkylation, or methoxycarbonylation of its anion (Scheme 2). The substituents on the N-atom exert a strong influence on the photochemical reactivity ([2 + 2] photocycloaddition