Photoredox β-thiol-α-carbonylation of enones accompanied by unexpected Csp<sup>2</sup>–C(CO) bond cleavage
作者:Rui Ma、Jie Feng、Kuili Zhang、Beichen Zhang、Ding Du
DOI:10.1039/d0ob01349h
日期:——
preliminary investigation of the mechanism indicated that a β-peroxysulfide intermediate was formed under the promotion of visible light under an oxygen atmosphere, which finally induced the unexpected C–C bond cleavage.
Synthesis of a library of 1,2,3,7-tetrasubstituted indolizines using poly(ethylene glycol) as soluble support
作者:Guizhou Yue、Zuxing Chen、Guichun Yang
DOI:10.1002/jhet.5570430340
日期:2006.5
A library of 1,2,3,7-tetrasubstitutedindolizines has been synthesized usingpoly(ethyleneglycol) (PEG) as soluble polymer support. The PEG-bound pyridinium salts reacted with alkenes or alkynes in the presence of Et3N via 1,3-dipolar cycloaddition to give PEG-bound indolizine derivatives, which were cleaved by 1 % KCN/MeOH to afford 1,2,3,7-tetrasubstitutedindolizines in good to excellent yields
N-containing heterocyclic compounds, compositions and use
申请人:Fujisawa Pharmaceutical Company, Ltd.
公开号:US05037824A1
公开(公告)日:1991-08-06
The invention relates to cardioprotective compounds of the formula: ##STR1## wherein R.sup.1, R.sup.2 R.sup.3 and R.sup.4 are moieties as described in the specification.
The development of catalytic asymmetric radical reactions is an attractive but formidable task. The high reactivity of radicals enables the use of readily accessible feedstocks and mild reaction conditions, but it leads to substantial difficulty for chiral catalysts to provide sufficient enantiocontrol. Moreover, a racemic background process is often inevitable, further deteriorating enantioselectivity