| 中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
|---|---|---|---|---|
| —— | 1,2,6-trimethyl-4-phenyl-1,4-dihydro-pyridine-3,5-dicarboxylic acid diethyl ester | 3274-34-8 | C20H25NO4 | 343.423 |
| —— | diethyl 2,6-dimethyl-1,4-diphenyl-1,4-dihydropyridine-3,5-dicarboxylate | 53219-37-7 | C25H27NO4 | 405.494 |
| 中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
|---|---|---|---|---|
| —— | 2,6-dimethyl-4-phenyl-1,4-dihydro-pyridine-3,5-dicarboxylic acid monoethyl ester | 57097-50-4 | C17H19NO4 | 301.342 |
| 1,4-二氢-2,6-二甲基-4-苯基-3,5-吡啶羧酸二甲酯 | dimethyl 4-phenyl-1,4-dihydro-2,6-dimethylpyridine-3,5-dicarboxylate | 70677-78-0 | C17H19NO4 | 301.342 |
| —— | 1,2,6-trimethyl-4-phenyl-1,4-dihydro-pyridine-3,5-dicarboxylic acid diethyl ester | 3274-34-8 | C20H25NO4 | 343.423 |
| 2,6-二甲基-4-(4-硝基苯基)-1,4-二氢吡啶-3,5-二羧酸二乙酯 | 2,6-dimethyl-4-(4-nitro-phenyl)-1,4-dihydro-pyridine-3,5-dicarboxylic acid diethyl ester | 21881-54-9 | C19H22N2O6 | 374.393 |
| —— | ET 2-Methyl-5-oxo-4-phenyl-1,4,5,7-tetrahydrofuro(3,4-B)pyridine-3-carboxylate | 130161-02-3 | C17H17NO4 | 299.326 |
| —— | diethyl 1-benzyl-1,4-dihydro-2,6-dimethyl-4-phenylpyridine-3,5-dicarboxylate | 66439-03-0 | C26H29NO4 | 419.521 |
| —— | diethyl 1-(di(ethoxycarbonyl)methyl)-1,4-dihydro-2,6-dimethyl-4-phenylpyridine-3,5-dicarboxylate | —— | C26H33NO8 | 487.55 |
| —— | diethyl 2,6-dimethyl-4-phenyl-1-[(4-sulfamoylanilino)methyl]-4H-pyridine-3,5-dicarboxylate | 1191399-43-5 | C26H31N3O6S | 513.615 |
| —— | 2,6-dimethyl-4-phenyl-1,4-dihydropyridine-3,5-dicarbohydrazide | 175547-80-5 | C15H19N5O2 | 301.348 |
| —— | 2,6-dimethyl-4-phenyl-1,4-dihydropyridine-3,5-dicarboxylic acid 5-bis[2-(aminothioxomethyl)hydrazide] | 1270020-07-9 | C17H21N7O2S2 | 419.531 |
| —— | N,3-dibenzyl-3,5-dicarbethoxy-6-methyl-2-methylene-4-phenyl-1,2,3,4-tetrahydropyridine | —— | C33H35NO4 | 509.645 |
Synthesis of polyhydroquinolines via Hantzsch’s multicomponent reaction (MCR) involves the use of a hygroscopic and moderately toxic ammonium salt as one of the key reactants. In our effort, we have found urea as an effective ammonia surrogate when the MCR was performed in the presence of sulphonic acid-functionalized Wang resin (Wang-OSO<sub>3</sub>H) as a polymeric and recoverable acidic catalyst under green conditions. Urea is relatively less hygroscopic/toxic than the commonly used ammonium salts used in this MCR. The methodology afforded a range of polyhydroquinolines in good yields. Depending on the nature of reaction conditions employed, the MCR afforded Biginelli product or 1,4-DHPs when the use of 1,3-diketone was omitted.