5362-76-5Relevant articles and documents
Copper-catalyzed direct benzylation or allylation of 1,3-azoles with N -tosylhydrazones
Zhao, Xia,Wu, Guojiao,Zhang, Yan,Wang, Jianbo
supporting information; experimental part, p. 3296 - 3299 (2011/04/24)
Cu-Catalyzed cross-coupling of N-tosylhydrazones with 1,3-azoles leads to the direct C-H benzylation or allylation. Cu carbene migratory insertion is proposed to play the key role in this transformation.
The far-ultraviolet photochemistry of alkylcyclopropenes in solution
Fahie, Brian J.,Leigh, William J.
, p. 1859 - 1867 (2007/10/02)
The photochemistry of 1,3,3-trimethylcyclopropene and 1-tert-butyl-3,3-dimethylcyclopropene has been investigated in hydrocarbon, methanol, and 1-hexene solution with far-ultraviolet (185-228 nm) light.Direct photolysis of the two compounds affords allene, alkyne, and 1,3-diene derivatives, formally as a result of initial bond cleavage to yield vinylcarbene intermediates.Products derived from cleavage of the most substituted (C1-C3) cyclopropene bond account for 60-80percent of the observed mixture in each case.Results from the photolysis of 1,3,3-trimethylcyclopropene-1-13C suggest a second pathway for formation of alkyne products in cyclopropene photochemistry, which occurs in competition with (or by exclusion of) the vinylcarbene -hydrogen migration pathway.The data are consistent with the intermediacy of a vinylidene species, formed by -hydrogen migration/ring opening, although attempts to chemically trap this intermediate with methanol or alkene were unsuccessful.Key words: cyclopropene, photolysis, vinylmethylene, propenylidene, far-UV.
THE REACTION OF α,β-UNSATURATED p-TOSYLHYDRAZONES WITH SULPHUR CHLORIDES
Bellesia, Franco,Grandi, Romano,Pagnoni, Ugo M.,Trave, Roberto
, p. 289 - 292 (2007/10/02)
α,β-Unsaturated p-tosylhydrazones react with tetravalent and divalent sulphur chlorides affording 1,2,3-thiadiazoles in good yields.The necessary methylene group adjacent to the C=N bond may be provided by electrophilic addition of a hydrogen chloride molecule.The major difference in the product distribution in the reactions of unsaturated and saturated p-tosylhydrazones with SOCl2, SCl2 or S2Cl2 is observed with substrates prepared from methyl ketones; on using SOCl2 a more favourable distribution of compounds derived from cyclization on the methyl group is obtained.