Metal-assisted reactions. Part 25. Heterogeneous and homogeneous catalytic transfer hydrogenolysis of allyloxytetrazoles to yield alkenes or alkanes
作者:M. Lurdes S. Cristiano、Robert A. W. Johnstone、Peter J. Price
DOI:10.1039/p19960001453
日期:——
Transferhydrogenolysis of 5-allyloxy-l-phenyltetrazoles using either a heterogeneous or a homogeneous palladium catalyst and a hydrogen donor leads to cleavage of the allyloxy C–O bond to yield an alkane or an alkene and 1-phenyltetrazolone, depending on the catalyst used.
Mechanistic Investigations into the Photochemistry of 4-Allyl-tetrazolones in Solution: A New Approach to the Synthesis of 3,4-Dihydro-pyrimidinones
作者:Luís M. T. Frija、Igor V. Khmelinskii、M. Lurdes S. Cristiano
DOI:10.1021/jo060164j
日期:2006.4.1
Photolysis (λ = 254 nm) of 4-allyl-tetrazolones 2a−c was carried out in methanol, 1-propanol, 1-hexanol, acetonitrile, and cyclohexane. The sole primaryphotochemicalprocess identified was molecular nitrogen elimination, with formation of pyrimidinones 6a−c. Following the primary photocleavage, secondary reactions were observed in acetonitrile and cyclohexane, leading to phenyl-isocyanate (7), aniline