Process

C - Chemistry – Metallurgy – 07 – C

Patent

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Details

C07C 209/16 (2006.01) C07C 29/143 (2006.01) C07C 33/20 (2006.01) C07C 211/29 (2006.01)

Patent

CA 2589692

A process for the preparation of a compound of Formula (1) wherein Ar represents an optionally substituted hydrocarbyl or an optionally substituted heterocyclyl group comprising an aromatic moiety; and R1 and R2 each independently represent an optionally substituted hydrocarbyl or an optionally substituted heterocyclyl group; said process comprising: a) reducing a compound of Formula (2) to form a compound of Formula (3): b) activating the compound of Formula (3) to form a compound of Formula (4): wherein OX represents a leaving group; and c) coupling the compound of Formula (4) to a compound of Formula (5): to form a compound of Formula (1). A stereoselective reduction of ketones to alcohols is also disclosed.

L'invention concerne une méthode de préparation d'un composé de formule (1) dans laquelle Ar est un hydrocarbyle éventuellement substitué ou un groupe hétérocyclyle éventuellement substitué comprenant un fragment aromatique; et R1 et R2 sont chacun, indépendamment, un hydrocarbyle éventuellement substitué ou un groupe hétérocyclyle éventuellement substitué. La méthode consiste à: a) réduire un composé de formule (2) pour former un composé de formule (3); b) activer le composé de formule (3) pour former un composé de formule (4) dans laquelle OX est un groupe partant; et c) coupler le composé de formule (4) à un composé de formule (5) pour former un composé de formule (1). L'invention concerne en outre une réduction stéréosélective de cétones en alcools.

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