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HONGKUN / PRODUCT DIRECTORY

(S)-Boc pyrrolidine bromophenacyl ketoamide | CAS 1007881-98-2

A 2S pyrrolidine ketoamide with N-Boc protection and a para-bromophenyl fragment, used in daclatasvir-related synthesis development where configuration, protection integrity and the pre-cyclization stage determine material selection.

CAS1007881-98-2
Molecular formulaC18H23BrN2O4
Molecular weight411.3 g/mol

Product overview

The 2S pyrrolidine centre, N-Boc protection and para-bromophenyl ketoamide define three separate aspects of this building block. CAS 1007881-98-2 identifies the open ketoamide stage, with formula C18H23BrN2O4, used in daclatasvir-related synthesis development. The corresponding cyclized imidazole is a different intermediate, CAS 1007882-04-3. Maintaining this distinction helps match the requested reaction stage and protection state. Qualification should combine structural identity with a stereoselective method and an assay for intact Boc-protected material. Review deprotected species and the cyclized derivative where they are relevant to the proposed preparation, and state the chemical and enantiomeric acceptance criteria separately.

Chemical identity

Chemical name
tert-Butyl (2S)-2-[[2-(4-bromophenyl)-2-oxoethyl]carbamoyl]pyrrolidine-1-carboxylate
CAS number
1007881-98-2
Molecular formula
C18H23BrN2O4
Molecular weight
411.3 g/mol

Application context

This protected ketoamide is a building block in daclatasvir-related synthesis development. Its 2S pyrrolidine centre, intact N-Boc group and para-bromophenyl ketoamide must match the stage required by the receiving route. Distinguish it from the cyclized imidazole CAS 1007882-04-3 and from deprotected material. The purchasing specification should combine structural identity, a suitable chiral method and chemical assay; ordinary achiral area purity does not quantify the opposite enantiomer.

Chemistry and synthetic role

The carbonyl-containing side chain is a ketoamide; the pyrrolidine nitrogen is protected as a tert-butoxycarbonyl group. The aryl bromine occupies the para position. A ring-closed imidazole is a different chemical stage and composition.

Quality review

Verify the ketoamide stage

Check the complete structure against the CAS and distinguish it from the cyclized imidazole CAS 1007882-04-3.

Measure S-enantiomer composition

Agree a chiral method and acceptance criterion; achiral area purity does not demonstrate the specified configuration.

Confirm Boc-protected content

Identify and assess any deprotected or structurally changed material using a method suitable for the protected input.

Preparing a specification

Specify CAS, full ketoamide structure, 2S configuration and N-Boc protection. State chemical assay, chiral purity method and criteria for relevant deprotected or cyclized relatives.

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 stereochemical evidence and structure-confirming spectra in addition to the routine chemical chromatogram.

Procurement questions

Is this already the imidazole intermediate?

No. CAS 1007881-98-2 identifies the ketoamide; the related cyclized imidazole has another CAS.

Does a high achiral HPLC purity establish S purity?

No. A suitable stereochemical test must address the enantiomeric composition.

Which related species should be distinguished during qualification?

Review deprotected material and the cyclized imidazole where relevant, using methods that distinguish them from the intact Boc-protected ketoamide.

Technical sources
  1. PubChem CID 56605334: identity properties and CAS synonymsNCBI / PubChem
  2. BD379995: (S)-tert-Butyl ketoamideBLD Pharm
  3. Daclatasvir-related compounds: A779618Ambeed