Analgesic compounds

Details Analgesic compounds Analgesic compounds

C - Chemistry, Metallurgy

07

K

530/5.04

C07K 5/107 (2006.01) C07K 5/087 (2006.01)

Patent

CA 1156219

X-4880-II -1- Abstract of the Disclosure A process for preparing novel compounds of the general formula Image (I) and pharmaceutically acceptable non-toxic acid addition salts thereof, in which L and D, when applicable, define the chirality; R1 and R2 independently are hydrogen or C1-C3 primary alkyl; R3 is C1-C4 primary or secondary alkyl or -CH2CH2-S-CH3; R4 is hydrogen or C1-C3 primary alkyl; R5 is hydrogen or C1-C3 primary alkyl; Y is hydrogen or acetyl; and Z is Image , -CH2OH, or -CN; subject to the limitation that one of R4 and R5 is C1-C3 primary alkyl and the other is hydrogen; which comprises cleaving the blocking agents from the correspond- ingly protected compound of formula (I) with an acid medium, is described herein. These compounds are useful as analgesic agents.

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