Substituted pyrazole derivatives condensed with six-membered heterocyclic rings
申请人:Bayer Aktiengesellschaft
公开号:US06743798B1
公开(公告)日:2004-06-01
The present invention relates to novel substituted pyrazole derivatives of the general formula (I)
in which R1, R2, R3 and A are each as defined, and to processes for their preparation and to their use as medicaments, in particular as medicaments for the treatment of cardiovascular disorders.
Studies on imidazole derivatives and related compounds.<b>4</b>. Synthesis of<i>O</i>-glycosides of 4-carbamoylimidazolium-5-olate
作者:Y. Tarumi、Y. Takebayashi、T. Atsumi
DOI:10.1002/jhet.5570210342
日期:1984.5
midazolium-4-olate (5) with 1,2,3,5-tetra-O-acetyl-β-D-ribofuranose in the presence of stannic chloride and trimethylsilyl trifluoromethanesulfonate afforded no 5-O-glycosides but N-1 ribosylated compound (6). However, 5-O-riboside (7a) and its orthoamide derivative (8) were given by glycosylation of tri-n-butylstannyl derivative of 5 with 2,3,5-tri-O-acetyl-β-D-ribofuranosyl chloride in the presence
There are provided compounds of the formula: ##STR1## wherein either R.sub.1 or R.sub.2 is a hydrogen atom, a hydroxy group, an acyloxy group, a phthalimido group or an acetamido group and the other is a hydrogen atom; either R.sub.3 or R.sub.4 is a hydroxy group or an acyloxy group and the other is a hydrogen atom; either R.sub.5 or R.sub.6 is a hydroxy group or an acyloxy group and the other is a hydrogen atom; either R.sub.7 or R.sub.8 is a hydrogen atom, a methyl group, a hydroxymethyl group, an acyloxymethyl group, an alkoxycarbonyl group, a group of the formula: ##STR2## (wherein X.sub.1 and X.sub.2 are a hydrogen atom or a lower alkyl group), or a carboxyl group and the other is a hydrogen atom; either R.sub.11 or R.sub.12 is a hydrogen atom, a hydroxy group or an acyloxy group and the other is a hydrogen atom; either R.sub.13 or R.sub.14 is a hydroxy group or an acyloxy group and the other is a hydrogen atom; either R.sub.15 or R.sub.16 is a methyl group, a hydroxymethyl group or an acyloxymethyl group and the other is a hydrogen atom; and a process for producing them. These compounds are useful as antitumor agents.
Enols of 2-nitro- and related 2-substituted malonamides
作者:Ahmad Basheer、Masaaki Mishima、Zvi Rappoport
DOI:10.1002/poc.1611
日期:——
The structures of 2‐substituted malonamides, YCH(CONR1R2)CONR3R4 (Y = Br, SO2Me, CONH2, COMe, and NO2) were investigated. When Y = Br, R1R2 = R3R4 = HEt; Y = SO2Me, R1–R4 = H and for Y = CONH2 or CONHPh, R1–R4 = Me, the structure in solution is that of the amide tautomer. X‐ray crystallography shows solid‐state amide structures for Y = SO2Me or CONH2, R1–R4 = H. Nitromalonamide displays an enol structure
研究了2-取代的丙二酰胺YCH(CONR 1 R 2)CONR 3 R 4(Y = Br,SO 2 Me,CONH 2,COMe和NO 2)的结构。当Y = Br时,R 1 R 2 = R 3 R 4 = HEt。Y = SO 2 Me,R 1 -R 4 = H,对于Y = CONH 2或CONHPh,R 1 -R 4 = Me,溶液中的结构是酰胺互变异构体。X射线晶体学显示Y = SO 2 Me或CONH 2的固态酰胺结构,R 1 -R 4 =H。硝基丙二酰胺在固态下显示具有强氢键的烯醇结构(在100 K时O … O距离= 2.3730Å),并且d(OH)≠d(O … H)。在溶液中观察到明显的对称烯醇,即使在高极性溶剂(如DMSO-d 6)中也占相当大的百分比,但随着溶剂极性的增加,K烯醇值会降低。的Ñ,Ñ ' -二甲基衍生物是以下烯醇。乙酰丙二酰胺在非极性溶剂中显示出乙酰基
Studies on imidazole derivatives and related compounds.<b>2</b>. Characterization of substituted derivatives of 4-carbamoylimidazolium-5-olate by ultraviolet absorption spectra
作者:Y. Tarumi、T. Atsumi
DOI:10.1002/jhet.5570200408
日期:1983.7
The representative mono- and dialkyl-substituted derivatives of 4-carbamoylimidazolium-5-olate (1) were synthesized unequivocally. On the basis of their spectral data for ultraviolet absorptionspectra in acidic, basic and neutral solutions, we have found some spectral characteristics which make it facile to clarify the position of substituents.