Participants
| Role | Name | HCID | Charge |
|---|
| Reactant | Dicyclohexylcarbodiimide | HCID 10868 | — |
| Reactant | 2-Dimethylaminopyridine | HCID 21885 | — |
| Reactant | 2,6-Dimethyl-4-(3-nitrophenyl)-1,4-dihydropyridine-3,5-dicarboxylic acid monomethyl ester | HCID 173322 | — |
| Reactant | 4-(Diphenylmethyl)-1-piperazineethanol | HCID 4742573 | — |
| Solvent | Toluene | HCID 1140 | — |
| Product | Manidipine | HCID 4008 | 54.4% |
Reaction Steps
To a suspension of 2,6-dimethyl-4-(3-nitro-phenyl)-1,4-dihydro-pyridine-3,5-dicarboxylic acid monomethyl ester (5 gm), dicyclohexyl carbodiimide (3.08 gm) and dimethylamino pyridine (0.25 gm) in toluene (30 ml) at room temperature was added 2-(4-benzhydryl piperazine-1-yl)ethanol (7.5 gm). Reaction mass was then heated to 70-75° C. for 2 hours. Reaction mass was then cooled to room temperature and filtered. Toluene layer was concentrated under vacuum to get manidipine base (5 gm).
Provenance & Evidence
| DOI | 10.6084/m9.figshare.5104873.v1 |
|---|
| Patent number | US09018376B2 |
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| Source dataset | uspto-grants-2015_04 |
|---|
| ORD ID | ord-560eb7a71ae64a37af1fd5388192132e |
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| Source note | uspto-grants-2015_04 |
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