Skip to product details

Chemical product profile

HONGKUN / PRODUCT DIRECTORY

2-Butyl-1,3-diazaspiro[4.4]non-1-en-4-one hydrochloride | CAS 151257-01-1

The hydrochloride form of a spirocyclic nitrogen building block used in published irbesartan routes, carrying the butyl-substituted ring fragment before attachment of the biphenylmethyl portion.

CAS151257-01-1
Molecular formulaC11H19ClN2O
Molecular weight230.73 g/mol

Product overview

A cyclopentane ring shares a spiro carbon with the carbonyl-containing diaza ring of this irbesartan building block. The material is the hydrochloride form of the butyl-substituted heterocycle. Salt composition and the assay reporting basis are central to comparing grades and calculating the amount of organic fragment charged.

Chemical identity

Chemical name
2-Butyl-1,3-diazaspiro[4.4]non-1-en-4-one hydrochloride
CAS number
151257-01-1
Molecular formula
C11H19ClN2O
Molecular weight
230.73 g/mol

Application context

In a reported irbesartan route, the spiro hydrochloride is joined to a halomethyl biphenyl compound through nitrogen substitution. The resulting intermediate retains the biphenyl nitrile for subsequent conversion. Specify the hydrochloride composition and assay basis for charging this step, including whether the result is expressed as salt or free-base equivalent.

Chemistry and synthetic role

The shared spiro atom links a cyclopentane ring to a carbonyl-containing diaza ring. In the documented route, nitrogen substitution introduces the biphenylmethyl group. The chloride belongs to the salt composition, unlike a chlorine atom covalently attached to a carbon skeleton.

Quality review

Establish the hydrochloride basis

Confirm salt form, chloride determination where needed and the basis used to report assay or effective free-base content.

Verify the spiro fragment

Identity testing should support the butyl group and ring connectivity; a matching elemental formula alone does not exclude structural isomers.

Relate the profile to N-substitution

Set related-substance, water and residual-solvent requirements from the qualified downstream reaction, without assuming universal limits.

Preparing a specification

State the hydrochloride identity, CAS and required assay basis. Agree how salt composition is checked and which chromatographic related substances matter to the intended nitrogen-substitution step. Specify water or solvent limits only where justified by the process.

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 the structural identification record, salt-form confirmation, assay method and proposed related-substance method. Confirm whether batch COA, SDS and any chloride or water data required for qualification are available.

Procurement questions

Can the free base be substituted directly?

Not automatically. Salt form affects composition and the calculation of the amount introduced into a process.

Which identity features should the spiro-fragment specification include?

Include the butyl substituent, the cyclopentane–diaza-ring connectivity and the hydrochloride form. This structure has no specified stereocentre requiring an enantiomeric-purity criterion.

How should the amount charged be calculated?

Use the agreed assay basis and hydrochloride composition, distinguishing salt mass from the corresponding free-base equivalent.

Technical sources
  1. PubChem CID 10176995: properties and CAS synonym crosscheckNCBI / PubChem
  2. 2-Butyl-1,3-diazaspiro[4.4]non-1-en-4-one hydrochlorideAmbeed
  3. US8609859B2: One pot process for preparing irbesartanPatent publication / Google Patents