894-56-4Relevant articles and documents
OPTICALLY ACTIVE CARBAMATES, PROCESS FOR PREPARATION THEREOF AND USE THEREOF AS PHARMACEUTICAL INTERMEDIATES
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Page/Page column 34-35, (2008/06/13)
The present invention is related to l-[(4-chlorophenyl)-phenylmethyl]-4-(2,2,2-trichloroethoxycarbonyl)-piperazine of the Formula (IV) and optically isomers thereof, process for preparation thereof and the use of the compound of the Formula (IV) in the preparation of l-(4-chlorophenyl)-phenylmethyl-piperazine and optical isomers and salts thereof. l-(4-chlorophenyl)-phenylmethyl-piperazine and optical isomers thereof are important intermediates in the preparation of non-sedating antihistamine-type active pharmaceutical ingredients.
Optically active 4-(tert-butoxycarbonyl) piperazine compound, and method for producing the same
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Example 7, (2008/06/13)
There is provided a 4-(tert-butoxycarbonyl)piperazine compound of formula (1) wherein X denotes a chlorine atom, a C1-C3 alkyl group or a C1-C3 alkoxy group, and optical isomers present therein. Compound of formula (1) is used in the separation of the ena