Studies in azide chemistry. Part V. Synthesis of 4-azido-2,3,5,6-tetrafluoro-, 4-azido-3-chloro-2,5,6-trifluoro-, and 4-azido-3,5-dichloro-2,6-difluoro-pyridine, and some thermal reactions of the tetrafluoro-compound
作者:R. E. Banks、G. R. Sparkes
DOI:10.1039/p19720002964
日期:——
6-tetrafluoropyridine and 4-amino-2,3,5,6-tetrafluoropyridine. Thermal decomposition of the azide in a mixture of cyclo-hexane, -heptane, and -octane reveals that C–H ‘insertion’ is encouraged by increase in ring size, and thermolysis experiments with cis- and trans-1,2-dimethylcyclohexane show that this type of reaction lacks stereospecificity. The results of reactions between the azide and trans-4-methylpent-2-ene
SelectiveN(1)-arylation of benzotriazole with activated aryl halides under conditions of phase transfer catalysis
作者:I. P. Beletskaya、D. V. Davydov、M. S. Gorovoi、S. V. Kardashov
DOI:10.1007/bf02496407
日期:1999.8
3-benzotriazole, with activated aryl halides in a medium of aromatichydrocarbons under conditions of phase transfer catalysis with the use of inorganic bases and cetyltrimethylammonium bromide as a phase-transfer catalyst was studied. Arylation affords bothN(1)- andN(2)-arylation products. Their ratio depends on the nature of the base and the reactivity of the arylating agent. In the presence of catalytic