A CB2 receptor modulator comprising an imidazole derivative represented by the general formula (I):
[wherein, R
1
represents optionally substituted lower alkyl or the like; R
2
represents optionally substituted cycloalkyl or the like; R
3
represents optionally substituted aryl or the like; and n represents an integer of 0 to 3] or a pharmaceutically acceptable salt thereof as an active ingredient, and the like are provided.
A CB2 receptor modulator comprising an imidazole derivative represented by the general formula (I):
[wherein, R1 represents optionally substituted lower alkyl or the like; R2 represents optionally substituted cycloalkyl or the like; R3 represents optionally substituted aryl or the like; and n represents an integer of 0 to 3] or a pharmaceutically acceptable salt thereof as an active ingredient, and the like are provided.
A general and efficient route to 6-methyl-pyrazin-2-yl-amines: Alkylation of 2,6-dichloropyrazine<i>via</i>malonate derivatives
作者:Paul J. J. Colbon、Alison C. Foster、Melvyn E. Giles、Zakariya Patel、John T. Singleton
DOI:10.1002/jhet.5570450531
日期:2008.9
We have developed a convenient two-stage process for the synthesis of 6-methylpyrazine-2-yl-amines from commercially available materials. The procedure involves the synthesis of (6-chloro-pyrazin-2-yl)-acetic acid via arylation of diethylmalonate and in situ hydrolysis/decarboxylation. A second decarboxylation takes place under the subsequent amination conditions allowing simple and efficient access