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Chemical product profile

HONGKUN / PRODUCT DIRECTORY

5-(Methoxycarbonyl)-2,6-dimethyl-4-(3-nitrophenyl)-1,4-dihydropyridine-3-carboxylic acid | CAS 74936-72-4

A dihydropyridine monoacid–monoester for published lercanidipine routes, with a retained methyl ester and a free carboxyl group for side-chain construction. Esterification state, ring integrity and C4 stereochemical requirements define material qualification.

CAS74936-72-4
Molecular formulaC16H16N2O6
Molecular weight332.31 g/mol

Product overview

One free carboxyl group and one methyl ester give this dihydropyridine two distinct functional ends. Its 2,6-dimethyl and 3-nitrophenyl substituents define the lercanidipine nucleus. Specify the monoacid–monoester composition, dihydropyridine ring integrity and any C4 stereochemical requirement when qualifying material for the next esterification.

Chemical identity

Chemical name
5-(Methoxycarbonyl)-2,6-dimethyl-4-(3-nitrophenyl)-1,4-dihydropyridine-3-carboxylic acid
CAS number
74936-72-4
Molecular formula
C16H16N2O6
Molecular weight
332.31 g/mol

Application context

In reported lercanidipine routes, the free carboxyl group is converted into a haloalkyl ester for subsequent connection with the amine-side-chain partner. The molecule supplies the substituted dihydropyridine nucleus while retaining its methyl ester and meta-nitrophenyl group. Qualification should address esterification state, ring integrity and any C4 stereochemical requirement of the receiving process.

Chemistry and synthetic role

The 1,4-dihydropyridine carries a free carboxylic acid and a methyl ester at its 3/5 positions. These different substituents make C4 a stereogenic centre. A requirement for a particular C4 configuration should be included in the purchase specification.

Quality review

Confirm monoacid–monoester composition

Ask the method to distinguish the intended form from relevant diacid, diester or other ester species.

Review dihydropyridine ring integrity

Agree a method that distinguishes the dihydropyridine from relevant aromatic pyridine species and set limits according to the receiving process.

Preserve aryl position and stereo definition

Confirm the meta-nitrophenyl group; any specific C4 configuration must be separately defined and supported.

Preparing a specification

Specify the full CAS-linked monoacid–methyl ester, including the 3-nitrophenyl group. State chemical assay and relevant ester-state/ring-related controls. If a C4 stereochemical requirement exists, add explicit identity and analytical criteria.

Packaging and storage

Agree packaging, net weight and transport arrangements for the selected grade, quantity and destination. Confirm storage and handling conditions using the current SDS for the proposed material.

Documentation

Request COA, SDS and structural spectra identifying the acid, methyl ester and dihydropyridine ring. Confirm method coverage for relevant esterification and oxidation-related species; request chiral data only if required by the defined grade.

Procurement questions

Is 'lercanidipine nucleus' a complete order description?

No. Include the full structure, CAS and monoacid–methyl ester form.

How should a C4 stereochemical requirement be specified?

State the required configuration or isomer profile and agree an isomer-selective method. The CAS identity does not designate a single C4 enantiomer.

Which ester forms should the method distinguish?

The target monoacid–methyl ester and relevant diacid, diester or other ester species associated with the selected route.

Technical sources
  1. PubChem CID 173322: properties and CAS synonymsNCBI / NLM / NIH
  2. 5-(Methoxycarbonyl)-2,6-dimethyl-4-(3-nitrophenyl)-1,4-dihydropyridine-3-carboxylic acid M2493Tokyo Chemical Industry
  3. WO2006059332A1 — Intermediates for preparation of lercanidipineWIPO patent publication / Google Patents