Imidazol-4-one or imidazole-4-thione compounds of formula (I):
wherein X, R
1
, R
2
, R
3
, R
4
, R
5
, and R
6
are defined herein. Also disclosed is a method for treating a cannabinoid receptor-mediated disorder with these compounds.
Kinetics and mechanism of the cyclization of ω-(p-nitrophenyl)-hydantoic acid amides: steric hindrance to proton transfer causes a 104-fold change in rateElectronic supplementary information (ESI) available: Observed first-order rate coefficients, constants for solvent and buffer catalysis for the cyclization reactions. See http://www.rsc.org/suppdata/ob/b2/b211040g/
作者:Violina T. Angelova、Anthony J. Kirby、Asen H. Koedjikov、Ivan G. Pojarlieff
DOI:10.1039/b211040g
日期:2003.2.27
slow protonation by water of the amino-group of the negatively charged tetrahedral intermediate. General base catalysis was observed with bases of pKBH up to 8. The Brønsted beta are compatible with a hydrogen bonding mechanism for the GBC. In the gem-dimethyl compounds 3 the leaving group is flanked by substituents on both sides. The N-methyl group in 3-MUAm hinders frontal access of the proton, causing
Imidazol-4-one or imidazole-4-thione compounds of formula (I):
wherein X, R1, R2, R3, R4, R5, and R6 are defined herein. Also disclosed is a method for treating a cannabinoid receptor-mediated disorder with these compounds.