A series of 2-anilino-1,6-dihydro-6-oxo-5-pyrimidinecarboxylic acids with various substituents was synthesized and evaluated in the rat passive cutaneous anaphylaxis test for antiallergic activity. High activity by intraperitoneal and oral administrations was observed for the 3-trifluoromethyl and 2-alkoxyanilino derivatives (64, 79, 81, 82 and 85). Structure-activity relationships are discussed.
The Synthesis of 3,5-Diamino-1,2,4-oxadiazoles. 2nd Communication
作者:Jefferson W. Tilley、Henri Ramuz、Paul Levitan、John F. Blount
DOI:10.1002/hlca.19800630412
日期:1980.6.6
The 5-amino-3-arylamino-1,2,4-oxadiazoles 2 are conveniently prepared by oxidative cyclization of the arylamidinoureas 10. The process is also capable of producing a variety of the 5-substituted-amino analogs 32 when the appropriately substituted guanidine 31 is employed as the substrate. Two different types of rearrangement leading to triazol-3-ones accompany cyclization depending on the choice of
The invention provides compounds of formula Ia′, Ib′, Ic′, and Id′:
and pharmaceutically acceptable salts thereof, wherein the variables A, R
6
, R
7
, R
8
, R
9
, R
x
, L, X, Y, and Z have the meaning as described herein. The compounds are useful for reducing endoplasmic reticulum stress and for producing analgesia in an animal.
A traceless linker approach to the solid phase synthesis of substituted guanidines utilizing a novel acyl isothiocyanate resin
作者:Lawrence J. Wilson、Sean R. Klopfenstein、Min Li
DOI:10.1016/s0040-4039(99)00663-2
日期:1999.5
Solid phase synthesis of a series of substituted guanidines based on a novel acyl isothiocyanate resin is presented. This method provides both mono and disubstitutedguanidines with a variety of sterically demanding and/or electron withdrawing substituents in good purities and yields.