The present invention relates to novel compounds of formula (IA), which are JAK3 Kinase inhibitors, methods for their preparation and pharmaceutical compositions comprising them.
The present invention relates to novel compounds of formula (IA), which are JAK3 Kinase inhibitors, methods for their preparation and pharmaceutical compositions comprising them.
Niyazymbetov, Murat E.; Rongfeng, Zhou; Evans, Dennis H., Journal of the Chemical Society. Perkin transactions II, 1996, # 9, p. 1957 - 1962
作者:Niyazymbetov, Murat E.、Rongfeng, Zhou、Evans, Dennis H.
DOI:——
日期:——
An investigation into the alkylation of 1,2,4-triazole
作者:Paul G Bulger、Ian F Cottrell、Cameron J Cowden、Antony J Davies、Ulf-H Dolling
DOI:10.1016/s0040-4039(99)02272-8
日期:2000.2
The alkylation of 1,2,4-triazole with 4-nitrobenzyl halides and a variety of bases afforded the 1- and 4-alkylated isomers with a consistent regioselectivity of 90:10. Previously reported regiospecific alkylations of 1,2,4-triazole were re-examined and the quoted isomer ratios were shown to depend on the isolation procedure. The use of DBU as base in the alkylation of 1,2,4-triazole allows for a convenient and high yielding synthesis of 1-substituted-1,2,4-triazoles. (C) 2000 Elsevier Science Ltd. All rights reserved.