75416-64-7Relevant academic research and scientific papers
PHOTOCYCLIZATION OF METHYL 2-ARYLTHIO- AND 2-ARYLOXY-ACETOACETATES A FACILE SYNTHESIS OF BENZOHETEROCYCLES
Sasaki, Tadashi,Hayakawa, Kenji,Ban, Hiroshi
, p. 85 - 91 (1982)
A series of methyl 2-arylthio- (2) and 2-aryloxy-acetoacetates (3) have been prepared and their tautomeric equilibria have been examined by 1H NMR spectroscopy.S-substitution at the α-position results in an increase of enol tautomer over 90percent, while
QUINOLINES AND THEIR THERAPEUTIC USE
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Page/Page column 54, (2008/06/13)
Compounds of formula [1] are CRTH2 antagonists, useful in the treatment of conditions having an inflammatory component; in which: R1, R2, R3, R4 and R5 are independently hydrogen, C1-C6alkyl, C1- C6fluoroalkyl, cyclopropyl, halo, -S(O)nR6, -SO2NR7R8, -NR7R8, -NR7C(O)R6, -CO2R7, -C(O)NR7R8, -C(O)R6, -NO2, -CN or a group -OR9; wherein each R6 is independently C1-C6alkyl, C1-C6fluoroalkyl, cycloalkyl, aryl, or heteroaryl; R7, R8 are independently C1-C6alkyl, C1-C6fluoroalkyl, cycloalkyl, cycloalkyl-(C1-C6alkyl)-, aryl, heteroaryl or hydrogen; R9 is hydrogen, C1-C6alkyl, C1-C6fluoroalkyl, cycloalkyl, cylcoalkyl-(C1-C6alkyl)-, or a group -SO2R6; A is -CHR10-, -C(O)-, -S(O)n-, -0-, or -NR10- wherein n is an integer from 0-2 and R10 is hydrogen, C1-C3alkyl, or C1-C6fluoroalkyl group; B is a direct bond, or a divalent radical selected from -CH2-, -CH2CH2-, -CHR11-, -CR11R12-, -CH2CHR11-, -CH2CR11R12-, -CHR11CHR12-, and divalent radicals of formula -(CR11R12)P-Z- wherein Z is attached to the ring carrying R1, R2 and R3; wherein R11 is C1-C3alkyl, cyclopropyl, C1-C6fluoroalkyl; R12 is methyl or fluoromethyl; p is independently 1 or 2; and Z is -0-, -NH-, or -S(O)n-, wherein n is an integer from 0-2; X is a carboxylic acid, tetrazole, 3-hydroxyisoxazole, hydroxamic acid, phosphinate, phosphonate, phosphonamide, or sulfonic acid group, or a group of formula C(=O)NHSO2R6or SO2NHC(=O)R6; and Y is aryl, heteroaryl, aryl-fused- heterocycloalkyl, heteroaryl-fused-cycloalkyl, heteroaryl-fused-heterocycloalkyl or aryl-fused-cycloalkyl group.
