100421-20-3Relevant articles and documents
Metal-free synthesis of novel indolizines from chromones and pyridinium salts via 1,3-dipolar cycloaddition, ring-opening and aromatization
Dong, Kai-Kai,Huang, Qiang
, p. 1871 - 1874 (2019)
A simple, efficient, and economical synthetic approach to construct a variety of stucturally novel indolizines bearing a phenolic hydroxy group has been developed through 1,3-dipolar cycloaddition of chromones and pyridinium salts. The methodology is tolerant of a wide range of functional groups and applicable to library synthesis.
1,3-DIPOLAR CYCLOADDITION REACTION OF CHROMONES AND COUMARIN WITH PYRIDINIUM YLIDES
Yokoe, Ichiro,Matsumoto, Shunsuke,Shirataki, Yoshiaki,Komatsu, Manki
, p. 1395 - 1398 (2007/10/02)
1,3-Dipolar cycloaddition reaction of N-iminopyridinium ylide (2) with chromones (1) gave pyrazolopyridines (3) in moderate yields.Similarly coumarin (4) reacted with 2 to give 6H--benzopyranopyrazolopyridin-6-one (5).Furthermore chromone (1) was cyclized with pyridinium phenacylide (6) to afford 1-(2'-hydroxybenzoyl)-3-benzoylindolizine (7).