.alpha.-substitution of unprotected .beta.-amino ester...

Details .alpha.-substitution of unprotected .beta.-amino ester... .alpha.-substitution of unprotected .beta.-amino ester...

C - Chemistry, Metallurgy

07

C

C07C 227/32 (2006.01) C07C 227/16 (2006.01) C07C 253/30 (2006.01)

Patent

CA 2358560

Methods for stereoselective substitution in which a (mono or un)-.alpha.- substituted unprotected .beta.-amino ester compound or salt thereof is reacted with an aliphatic electrophile in the presence of a base selected from alkyl lithium compounds, lithium hybride, lithium amide, lithium dialkyl amides and alkali hexamethyldisilylamines.

L'invention concerne des procédés de substitution stéréosélective dans lesquels on met à réagir un composé de beta -amino ester non protégé (mono ou non)- alpha substitué, ou un sel de celui-ci, avec un électrophile aliphatique en présence d'une base sélectionnée dans le groupe constitué par des composés de lithium alkylés, un hydrure de lithium, un amide de lithium, des amides dialkylés de lithium et des hexaméthyldisilylamines alcalines.

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