Process

C - Chemistry – Metallurgy – 07 – D

Patent

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260/356, 260/369

C07D 493/04 (2006.01) C07D 301/02 (2006.01) C07D 303/04 (2006.01)

Patent

CA 2030969

B2873/Abs Abstract A process for the preparation of a compound of formula (A)' or (A)'': Image (A)' (S,S)-isomer Image (A)'' (R,R)-isomer which process comprises the base treatment of a quaternary ammonium salt of a compound of formula (D): Image (D) wherein the NH2 and OH moieties are trans and are (R,S) or (S,R), respectively.

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