Whereas cyclopentenylcarbenes resulting from photocycloaddition of 4-alk-1-ynylcoumarins to 2,3-dimethylbut-2-ene undergo tandem cyclization to hitherto unknown tetracyclic (4-hetera)cyclopent[b, c]acenaphthylenes, the corresponding cyclopentenylnitrenes stemming from 4-cyanocoumarins and the same alkene are converted into tricyclic imines via H-abstraction.
Mali, Raghao S.; Deshpande, Jyoti V., Organic Preparations and Procedures International, 1995, vol. 27, # 6, p. 663 - 667
作者:Mali, Raghao S.、Deshpande, Jyoti V.
DOI:——
日期:——
Light-Induced Coumarin Cyclopentannelation
作者:Marko Soltau、Maren Göwert、Paul Margaretha
DOI:10.1021/ol051952i
日期:2005.11.1
Whereas cyclopentenylcarbenes resulting from photocycloaddition of 4-alk-1-ynylcoumarins to 2,3-dimethylbut-2-ene undergo tandem cyclization to hitherto unknown tetracyclic (4-hetera)cyclopent[b, c]acenaphthylenes, the corresponding cyclopentenylnitrenes stemming from 4-cyanocoumarins and the same alkene are converted into tricyclic imines via H-abstraction.