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Chemical product profile

HONGKUN / PRODUCT DIRECTORY

2-[2-(2,2,2-Trifluoroethoxy)phenoxy]ethyl methanesulfonate | CAS 160969-03-9

A covalent mesylate ester supplies the substituted phenoxyethyl side chain in published silodosin routes. Qualification should confirm the activated ester, its alcohol precursor content and the ortho substitution pattern before assessing alkylation suitability.

CAS160969-03-9
Molecular formulaC11H13F3O5S
Molecular weight314.28 g/mol

Product overview

The word methanesulfonate describes an ester in CAS 160969-03-9, not a salt of silodosin or an amine. A phenoxyethyl chain carries the activated terminal group, while a neighbouring ring oxygen bears a trifluoroethyl substituent. This exact arrangement appears in published silodosin synthesis as an alkylation partner for an amine-containing intermediate. The molecule has no specified stereocentre; the chiral identity of the silodosin sequence belongs to a separate component. Buyers should distinguish the activated ester from the corresponding alcohol CAS 160969-02-8 and specify the intact reactive-material assay. Matching only a fluorine-containing aromatic name leaves both the activation state and the substitution pattern unresolved.

Chemical identity

Chemical name
2-[2-(2,2,2-Trifluoroethoxy)phenoxy]ethyl methanesulfonate
CAS number
160969-03-9
Molecular formula
C11H13F3O5S
Molecular weight
314.28 g/mol

Application context

Silodosin routes use this activated phenoxyethyl ester to alkylate an amine-containing indoline intermediate. The mesylate is a covalent leaving group, while the trifluoroethoxy substituent remains in the transferred side chain. Incoming control should quantify intact ester and separate the corresponding alcohol CAS 160969-02-8. The receiving coupling step also needs its own assessment of alkylation selectivity and the chiral component used in that sequence.

Chemistry and synthetic role

The sulfonate is bonded through oxygen to the phenoxyethyl chain. Its role is to activate that chain for substitution by an amine in the cited route. The trifluoroethoxy group is a retained structural substituent.

Quality review

Confirm ester rather than salt

Check the covalent methanesulfonate structure and do not accept a generic mesylate description without the full name.

Assess precursor alcohol

Agree a method that distinguishes the activated material from the corresponding phenoxyethanol.

Keep chirality and reaction selectivity separate

This side-chain reagent has no specified stereocentre. Downstream chiral identity and overalkylation control must be addressed at their relevant stages.

Preparing a specification

Specify CAS 160969-03-9, the covalent mesylate ester, ortho ring substitution and reactive assay. Agree alcohol-precursor and other route-related impurity criteria with the receiving laboratory.

Packaging and storage

Confirm packaging format, net weight and transport arrangements for the selected grade, order quantity and destination. Request the applicable SDS and label to establish storage and handling conditions.

Documentation

Request the proposed specification, batch COA and current SDS. Confirm availability of the analytical methods and batch evidence relevant to the intended process. Request spectra confirming activation state and a chromatogram resolving the alcohol precursor where relevant.

Procurement questions

Is this silodosin mesylate salt?

No. It is a separate covalent ester used as a side-chain reagent.

Does this reagent determine silodosin chirality?

It has no specified stereocentre; the relevant chiral component must be qualified separately.

Which precursor should the assay distinguish?

The corresponding alcohol, CAS 160969-02-8, should be resolved where relevant so that the assay measures the intact activated mesylate ester.

Technical sources
  1. PubChem CID 10519307: identity properties and CAS synonymsNCBI / PubChem
  2. WO2011101864A1: Process for synthesis of phenoxyethyl derivativesWIPO publication via Google Patents
  3. WO2015015512A2: Preparation of silodosin and its gamma formWIPO publication via Google Patents
  4. API intermediates catalogueCeleste Life Sciences