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.
Intramolecularity of the Thermal Rearrangement of Allyloxytetrazoles to N-Allyltetrazolones†
作者:M. Lurdes S. Cristiano、Robert A. W. Johnstone
DOI:10.1039/a608333a
日期:——
The intramolecularity of the thermalrearrangement of 1-aryl-5-allyloxy-1H-tetrazoles 1 to 1-aryl-4-allyl-1,4-dihydrotetrazol-5-ones 2 has been investigated through cross-over studies: the results support the hypothesis for a concerted sigmatropic rearrangement occurring through a highly polar transition state, in which a partially positively charged allyl group migrates from oxygen to nitrogen, without
Novel efficient synthesis of 3,4-dihydro-6-substituted-3-phenylpyrimidin-2(1H)-ones
作者:Luís M.T. Frija、Igor V. Khmelinskii、M. Lurdes S. Cristiano
DOI:10.1016/j.tetlet.2005.07.101
日期:2005.9
A new attractive and convenient strategy for the synthesis of 3,4-dihydro-6-substituted-3-phenylpyrimidin-2(1H)-ones is described. Photolysis (λ = 254 nm) of 4-allyl-tetrazolones in alcoholic solutions produces the corresponding pyrimidinones as the sole product in nearly quantitative yields, with simultaneous extrusion of molecular nitrogen. Work-up procedures consist in the simple evaporation of
Cristiano, M. Lurdes S.; Johnstone, Robert A. W., Journal of the Chemical Society. Perkin Transactions 2 (2001), 1997, # 3, p. 489 - 494
作者:Cristiano, M. Lurdes S.、Johnstone, Robert A. W.
DOI:——
日期:——
Substituent Effects on EI-MS Fragmentation Patterns of 5-Allyloxy-1-aryl-tetrazoles and 4-Allyl-1-aryl-tetrazole-5-ones; Correlation with UV-Induced Fragmentation Channels
作者:Alina Secrieru、Rabah Oumeddour、Maria L. S. Cristiano
DOI:10.3390/molecules26113282
日期:——
present work, we unravel the fragmentation patterns of a chemically diverse range of 5-allyloxy-1-aryl-tetrazoles and 4-allyl-1-aryl-tetrazolole-5-ones when subjected to electron impact mass spectrometry (EI-MS) and investigate the correlation with the UV-induced fragmentation channels of the matrix-isolated tetrazole derivatives. Our results indicate that the fragmentation pathways of the selected tetrazoles