中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
—— | ethyl 5-amino-3-(methylsulfonyl)-1H-pyrazole-4-carboxylate | 62390-94-7 | C7H11N3O4S | 233.248 |
—— | 5-chloroacetylamino-3-methylsulfanyl-1H-pyrazole-4-carboxylic acid ethyl ester | 1432744-19-8 | C9H12ClN3O3S | 277.732 |
—— | 1-(4-carbethoxy-3-methylthio-1H-pyrazol-5-yl)-3-phenylthiourea | 54417-46-8 | C14H16N4O2S2 | 336.439 |
—— | 3-methylsulfanyl-5-(3-(4-methyl phenyl)-thioureido)-1H-pyrazole-4-carboxylic acid ethyl ester | 54417-47-9 | C15H18N4O2S2 | 350.466 |
—— | ethyl 5-amino-1-(2-cyanoethyl)-3-methylthiopyrazole-4-carboxylate | 340682-70-4 | C10H14N4O2S | 254.313 |
—— | 5-benzoylamino-3-methylsulfanyl-1H-pyrazole-4-carboxylic acid ethyl ester | 387830-70-8 | C14H15N3O3S | 305.357 |
5-氨基-3-(甲基硫代)-1-苯基-1H-吡唑-4-羧酸乙酯 | 5-amino-3-methylsulfanyl-1-phenyl-1H-pyrazole-4-carboxylic acid ethyl ester | 40745-03-7 | C13H15N3O2S | 277.347 |
—— | 5-amino-1-(p-methylbenzoylmethyl)-4-ethoxycarbonyl-3-methylthio-1H-pyrazole | 852300-54-0 | C16H19N3O3S | 333.411 |
—— | 5-amino-1-(p-chlorobenzoylmethyl)-4-ethoxycarbonyl-3-methylthio-1H-pyrazole | 852300-56-2 | C15H16ClN3O3S | 353.829 |
3-O-Benzyl-6-deoxy-1,2-O-isopropylidene-6-(dimethylaminomethylene)-α-D-xylo-hept-5-ulofuranurononitrile (1) was reacted with amidinium salts, S-methylisothiouronium sulfate, and guanidinium chloride, respectively, in the presence of bases to furnish the 4-(3-O-benzyl-1,2-O-isopropylidene- α-D-xylo-tetrofuranos-4-yl)pyrimidine-5-carbonitriles 2 and the 4-(1,2-O-isopropylidene- α-D-glycero-tetr-3-enofuranos-4-yl)pyrimidine-5-carbonitriles 3, respectively. Treatment of 1 with ethyl 5-aminopyrazole-4-carboxylates yielded the ethyl 7-(3-O-benzyl-1,2-O-isopropylidene- α-D-xylo-tetrofuranos-4-yl)-6-cyanopyrazolo[1,5-a]pyrimidine-3-carboxylates 4 and the ethyl 7-amino-6-(3-O-benzyl-1,2-O-isopropylidene-α-D-xylo-pentofuranuronoyl)pyrazolo[1,5-a]pyrimidine- 3-carboxylates 5, respectively. Reaction of 1 with 2-benzimidazolylacetonitrile in the presence of sodium methanolate afforded 1-amino-2-(3-O-benzyl-1,2-O-isopropylidene-α-D-xylo-pentofuranuronoyl) benzo[4,5]imidazo[1,2-a]pyridine-4-carbonitrile (6) and 1-amino-2-(3-deoxy-1,2-O-isopropylidene- α-D-glycero-pent-3-enofuranuronoyl)benzo[4,5]imidazo[1,2-a]pyridine-4-carbonitrile (7).