(R)-4,5,6,7-Tetrahydrobenzothiazole-2,6-diamine

(R)-4,5,6,7-Tetrahydrobenzothiazole-2,6-diamine is a chiral diamine used to build R-configured aminobenzothiazole derivatives. The aliphatic amine at the stereogenic ring carbon provides the principal side-chain attachment site, while the 2-amino group forms part of the heterocyclic framework. Its R configuration distinguishes it from the S intermediate used for pramipexole.

The selected free base supplies the stereochemical core for dexpramipexole-related synthesis. Introducing an N-propyl substituent at the ring-bound amine produces the corresponding R-configured propylamino framework. Acylation followed by reduction is one way to construct that nitrogen-linked carbon chain. Other nitrogen substituents provide access to related chiral compounds, and the opposite enantiomer also supports investigations of stereochemical impurities in S-series processes.

Typical Applications

• Dexpramipexole-route intermediates: Used as the R-configured diamine for installation of the propylamino side chain, including routes through an N-propionyl intermediate and subsequent amide reduction.
• Enantiomer-related analytical materials: Used to prepare R-series derivatives for development of chiral separation methods and investigation of opposite-enantiomer impurities in related S-configured products.

Specifications

Specifications describe the standard grade. Tolerance, test method and documentation package are confirmed per order.