在100 mL的溶剂中,加入2-丁酮(20 g, 0.28 mol, 1.0 eq)、2-氰基乙酸乙酯(31.4 g, 0.28 mol, 1.0 eq)和硫(8.9 g, 0.28 mol, 1.0 eq),混合均匀。向其中加入二乙胺(21 g,0.28 mol,1.0 eq)。将此混合物在室温下搅拌8小时。
完成后,用水稀释反应混合物并进行过滤收集沉淀。从乙醇中重结晶后得到黄色固体2-氨基-4,5-二甲基噻吩-3-甲酸乙酯(41 g, 75%)。
作为一种有机中间体,2-氨基-4,5-二甲基噻吩-3-羧酸乙酯已被报道可用于制备具有二氮杂七元环结构的二氮杂卓化合物。
中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
4,5-二甲基-2-氨基噻吩-3-甲酸 | 2-amino-4,5-dimethylthiophene-3-carboxylic acid | 55502-96-0 | C7H9NO2S | 171.22 |
—— | Ethyl 2-azido-4,5-dimethylthiophene-3-carboxylate | 1147101-51-6 | C9H11N3O2S | 225.271 |
乙基2-异硫氰酸基-4,5-二甲基-3-噻吩羧酸酯 | ethyl 2-isothiocyanato-4,5-dimethylthiophene-3-carboxylate | 85716-85-4 | C10H11NO2S2 | 241.335 |
—— | ethyl 2-(dimethylaminomethyleneamino)-4,5-dimethyl-thiophene-3-carboxylate | 315684-87-8 | C12H18N2O2S | 254.353 |
—— | 2-acetamido-3-carbethoxy-4,5-dimethylthiophene | 13267-52-2 | C11H15NO3S | 241.311 |
—— | N-(1H-tetrazol-5-yl)-N'-(3-carbethoxy-4,5-dimethylthiophen-2-yl)formamidine | —— | C11H14N6O2S | 294.337 |
—— | 4,5-Dimethyl-2-propionylamino-thiophene-3-carboxylic acid ethyl ester | 72965-17-4 | C12H17NO3S | 255.338 |
2-(2-氯乙酰基氨基)-4,5-二甲基噻吩-3-羧酸乙酯 | 2-(2-chloro-acetylamino)-4,5-dimethyl-thiophene-3-carboxylic acid ethyl ester | 60442-34-4 | C11H14ClNO3S | 275.756 |
—— | methyl N-(3-carbethoxy-4,5-dimethylthienyl)dithiocarbamate | 201420-08-8 | C11H15NO2S3 | 289.444 |
—— | 4,5-dimethyl-2-(3-methyl-thioureido)-thiophene-3-carboxylic acid ethyl ester | 59898-39-4 | C11H16N2O2S2 | 272.392 |
—— | Ethyl 2-(butanoylamino)-4,5-dimethylthiophene-3-carboxylate | —— | C13H19NO3S | 269.36 |
—— | ethyl 2-[(hydrazinothioxomethyl)amino]-4,5-dimethylthiophene-3-carboxylate | 185202-40-8 | C10H15N3O2S2 | 273.38 |
—— | ethyl 4,5-dimethyl-2-ethoxycarbonylaminothiophene-3-carboxylate | 62349-15-9 | C12H17NO4S | 271.337 |
—— | Ethyl 4,5-dimethyl-2-(2-methylpropanoylamino)thiophene-3-carboxylate | —— | C13H19NO3S | 269.36 |
—— | Ethyl 4,5-dimethylthiophene-3-carboxylate | —— | C9H12O2S | 184.26 |
—— | Ethyl 4,5-dimethyl-2-(3-methylbutanoylamino)thiophene-3-carboxylate | —— | C14H21NO3S | 283.39 |
—— | Ethyl 2-(2,2-dimethylpropanamido)-4,5-dimethylthiophene-3-carboxylate | —— | C14H21NO3S | 283.39 |
—— | 2-(3-ethyl-thioureido)-4,5-dimethyl-thiophene-3-carboxylic acid ethyl ester | 59898-40-7 | C12H18N2O2S2 | 286.419 |
—— | 2-(5-Chloro-pentanoylamino)-4,5-dimethyl-thiophene-3-carboxylic acid ethyl ester | 304898-28-0 | C14H20ClNO3S | 317.837 |
—— | 2-[3-(2-Chloro-ethyl)-ureido]-4,5-dimethyl-thiophene-3-carboxylic acid ethyl ester | 110164-76-6 | C12H17ClN2O3S | 304.798 |
—— | 1-(4,5-dimethyl-3-ethoxycarbonyl-thien-2-yl)-3-isopropyl-urea | —— | C13H20N2O3S | 284.379 |
4,5-二甲基-2-(丙-2-烯基硫代氨基甲酰氨基)噻吩-3-羧酸乙酯 | 2-[[(2-propenylamino)thioxomethyl]amino]-4,5-dimethyl-3-thiophenecarboxylic acid ethyl ester | 50629-08-8 | C13H18N2O2S2 | 298.43 |
—— | 2-(3-Carboxy-propionylamino)-4,5-dimethyl-thiophene-3-carboxylic acid ethyl ester | 109164-40-1 | C13H17NO5S | 299.348 |
—— | Ethyl 2-(butylcarbamoylamino)-4,5-dimethylthiophene-3-carboxylate | 106666-24-4 | C14H22N2O3S | 298.406 |
—— | 2-(3-butyl-thioureido)-4,5-dimethyl-thiophene-3-carboxylic acid ethyl ester | 59898-41-8 | C14H22N2O2S2 | 314.473 |
—— | 2-(3-carboxy-acryloylamino)-4,5-dimethyl-thiophene-3-carboxylic acid ethyl ester | 295347-56-7 | C13H15NO5S | 297.332 |
—— | N-phenyl-N'-<2-(3-ethoxycarbonyl-4,5-dimethylthienyl)>urea | 106666-26-6 | C16H18N2O3S | 318.397 |
—— | 4,5-dimethyl-2-(3-phenyl-thioureido)-thiophene-3-carboxylic acid ethyl ester | 59898-45-2 | C16H18N2O2S2 | 334.463 |
—— | Ethyl 4,5-dimethyl-2-(2-methylprop-2-enylcarbamothioylamino)thiophene-3-carboxylate | —— | C14H20N2O2S2 | 312.457 |
—— | ethyl 4,5-dimethyl-2-({[(4-methylphenyl)amino]carbonothioyl}amino)thiophene-3-carboxylate | 59898-47-4 | C17H20N2O2S2 | 348.49 |
—— | 2-benzoylamino-4,5-dimethyl-thiophene-3-carboxylic acid ethyl ester | 52535-68-9 | C16H17NO3S | 303.382 |
—— | Ethyl 4,5-dimethyl-2-[(phenoxyacetyl)amino]thiophene-3-carboxylate | 302803-45-8 | C17H19NO4S | 333.408 |
—— | ethyl 4,5-dimethyl-2-[(3-methylphenylcarbamoyl)amino]thiophene-3-carboxylate | 476319-49-0 | C17H20N2O3S | 332.423 |
—— | 4,5-dimethyl-2-(3-phenyl-thioureido)thiophene-3-carboxylic acid ethyl ester | 185202-41-9 | C16H19N3O2S2 | 349.478 |
—— | 2-(3-benzyl-thioureido)-4,5-dimethyl-thiophene-3-carboxylic acid ethyl ester | 59898-44-1 | C17H20N2O2S2 | 348.49 |
—— | ethyl 2-({[(4-chlorophenyl)amino]carbonothioyl}amino)-4,5-dimethylthiophene-3-carboxylate | 175599-97-0 | C16H17ClN2O2S2 | 368.908 |
—— | 4,5-dimethyl-2-(3-o-tolyl-thioureido)-thiophene-3-carboxylic acid ethyl ester | 59898-46-3 | C17H20N2O2S2 | 348.49 |
—— | Ethyl 2-(benzylcarbamoylamino)-4,5-dimethylthiophene-3-carboxylate | 203808-31-5 | C17H20N2O3S | 332.423 |
—— | 2-(3-cyclohexyl-thioureido)-4,5-dimethyl-thiophene-3-carboxylic acid ethyl ester | 59898-43-0 | C16H24N2O2S2 | 340.511 |
—— | Ethyl 4,5-dimethyl-2-{[(4-methylphenoxy)acetyl]amino}thiophene-3-carboxylate | 328548-74-9 | C18H21NO4S | 347.435 |
—— | Ethyl 2-{[(4-chlorophenoxy)acetyl]amino}-4,5-dimethylthiophene-3-carboxylate | 314047-21-7 | C17H18ClNO4S | 367.853 |
—— | 2-[3-(4-ethoxy-phenyl)-thioureido]-4,5-dimethyl-thiophene-3-carboxylic acid ethyl ester | 65233-95-6 | C18H22N2O3S2 | 378.516 |
—— | Ethyl 4,5-dimethyl-2-{[(2-naphthyloxy)acetyl]amino}thiophene-3-carboxylate | 444927-73-5 | C21H21NO4S | 383.468 |
—— | Ethyl 2-[(4-ethoxycarbonylphenyl)carbamothioylamino]-4,5-dimethylthiophene-3-carboxylate | 109343-17-1 | C19H22N2O4S2 | 406.527 |
—— | Ethyl 2-[(2-chlorophenyl)carbamothioylamino]-4,5-dimethylthiophene-3-carboxylate | 175599-98-1 | C16H17ClN2O2S2 | 368.908 |
—— | ethyl 4,5-dimethyl-2-(3-benzoylthioureido)-3-thiophenecarboxylate | 53162-53-1 | C17H18N2O3S2 | 362.474 |
—— | Ethyl 2-benzenesulfonamido-4,5-dimethylthiophene-3-carboxylate | —— | C15H17NO4S2 | 339.436 |
—— | Ethyl 2-[[2-(3,4-dichlorophenoxy)acetyl]amino]-4,5-dimethylthiophene-3-carboxylate | 1026821-95-3 | C17H17Cl2NO4S | 402.298 |
—— | N-(2-methoxyphenyl)-N'-<2-(2-carbethoxy-4,5-dimethyl)>thienyl urea | 956896-83-6 | C17H20N2O4S | 348.423 |
—— | ethyl 4,5-dimethyl-2-[(4-methylphenyl)sulfonylamino]thiophene-3-carboxylate | —— | C16H19NO4S2 | 353.5 |
—— | Ethyl 2-{[(4-chloro-3-methylphenoxy)acetyl]amino}-4,5-dimethyl-3-thiophenecarboxylate | 302803-48-1 | C18H20ClNO4S | 381.88 |
—— | 2-(3-Carboxy-propionylamino)-4,5-dimethyl-thiophene-3-carboxylic acid | 128118-38-7 | C11H13NO5S | 271.294 |
—— | 2-[3-(4-Bromo-2-fluoro-benzyl)-ureido]-4,5-dimethyl-thiophene-3-carboxylic acid ethyl ester | 1027143-83-4 | C17H18BrFN2O3S | 429.31 |
—— | (E)-2-((3-ethoxy-2-(ethoxycarbonyl)-3-oxopropylidene)amino)-4,5-dimethylthiophene-3-carboxylic acid | 1421702-51-3 | C15H19NO6S | 341.385 |
—— | 2-bromo-4,5-dimethyl-3-thiophenecarboxylic acid, ethyl ester | 175217-21-7 | C9H11BrO2S | 263.155 |
2-苯甲酰氨基-4,5-二甲基-噻吩-3-羧酸 | 2-benzoylamino-4,5-dimethyl-thiophene-3-carboxylic acid | 52535-72-5 | C14H13NO3S | 275.328 |
—— | 2-[5-[4-(2-methoxyphenyl)-1-piperazinyl]pentanoylamino]-4,5-dimethyl-3-thiophenecarboxylic acid ethyl ester | 304898-29-1 | C25H35N3O4S | 473.637 |
—— | N-(3-carboethoxy-4,5-dimethylthien-2-yl)-N'-[2-[4-(2-methoxyphenyl)piperazin-1-yl]ethyl]urea | 110164-77-7 | C23H32N4O4S | 460.597 |
—— | Ethyl 2-(1,3-benzoxazol-2-ylamino)-4,5-dimethylthiophene-3-carboxylate | 159852-76-3 | C16H16N2O3S | 316.381 |
4,5-二甲基噻吩-3-羧酸 | 4,5-dimethyl-3-thiophencarboxylic acid | 19156-52-6 | C7H8O2S | 156.205 |
Thienopyrimidin-4-amines have been synthesized, evaluated and modelled as phosphodiesterase inhibitors.