[EN] METHOD FOR THE SYNTHESIS OF 4-ALKOXY-, 4-HYDROXY- AND 4-ARYLOXY-SUBSTITUTED TETRAHYDRO-FURO[3,4-B]FURAN-2(3H)-ONE COMPOUNDS [FR] PROCÉDÉ DE SYNTHÈSE DE COMPOSÉS DE TÉTRAHYDRO-FURO[3,4-B]FURAN-2(3H)-ONE SUBSTITUÉS 4-ALKOXY-, 4-HYDROXY- AND 4-ARYLOXY
[EN] METHOD FOR THE SYNTHESIS OF 4-ALKOXY-, 4-HYDROXY- AND 4-ARYLOXY-SUBSTITUTED TETRAHYDRO-FURO[3,4-B]FURAN-2(3H)-ONE COMPOUNDS [FR] PROCÉDÉ DE SYNTHÈSE DE COMPOSÉS DE TÉTRAHYDRO-FURO[3,4-B]FURAN-2(3H)-ONE SUBSTITUÉS 4-ALKOXY-, 4-HYDROXY- AND 4-ARYLOXY
A simple and selective acetylation of primary alcohols in the presence of other reactive functionalities such as secondary alcohol, phenol, acetonide and amine is described using mild ethylacetate as the acetyl-transfer agent and solid potassium carbonate as the catalyst.
[EN] METHOD FOR THE SYNTHESIS OF HEXAHYDROFURO (2, 3-B) FURAN-3-OL COMPOUNDS<br/>[FR] PROCÉDÉ DE SYNTHÈSE DE COMPOSÉS HEXAHYDROFURO(2,3-B)FURAN-3-OL
申请人:DSM IP ASSETS BV
公开号:WO2008034598A1
公开(公告)日:2008-03-27
[EN] The present invention relates to a method for the synthesis of enantiomerically and diastereomerically enriched hexahydro-furo[2,3-b]furan-3-ol compounds by aldol coupling of two suitable O-protected hydroxyaldehydes and subsequent removal of the protecting groups and (optionally simultaneous) cyclization of the resulting aldol compound and subsequent isolation of the desired compounds. The resulting composition can be further diastereomerically enriched through the intermittent acylation or aroylation of the compound and further optionally using a stereoselective hydrolyzing enzyme. [FR] La présente invention concerne un procédé pour la synthèse de composés hexahydro-furo[2,3-b]furan-3-ol enrichis en énantiomères et en diastéréomères par le couplage par aldol de deux hydroxyaldéhydes protégés par O appropriés, l'élimination ultérieure des groupes protecteurs, la cyclisation (facultativement simultanée) du composé aldol résultant, et l'isolement ultérieur des composés désirés. La composition résultante peut être encore enrichie en diastéréomères par l'acylation ou l'aroylation intermittente du composé et, en plus, par l'utilisation facultative à l'aide d'une enzyme hydrolysante stéréosélective.
[EN] METHOD FOR THE SYNTHESIS OF 4-ALKOXY-, 4-HYDROXY- AND 4-ARYLOXY-SUBSTITUTED TETRAHYDRO-FURO[3,4-B]FURAN-2(3H)-ONE COMPOUNDS<br/>[FR] PROCÉDÉ DE SYNTHÈSE DE COMPOSÉS DE TÉTRAHYDRO-FURO[3,4-B]FURAN-2(3H)-ONE SUBSTITUÉS 4-ALKOXY-, 4-HYDROXY- AND 4-ARYLOXY
申请人:DSM IP ASSETS BV
公开号:WO2009030733A1
公开(公告)日:2009-03-12
The present invention relates to a method for the synthesis of enantiomerically and diastereomerically enriched 4-alkoxy-, 4-hydroxy- or 4-aryloxy- substituted tetrahydro-furo[3,4-b]furan-2(3H)-ones by aldol coupling of a suitable hydroxyl-protected hydroxy-acetaldehyde and 4-oxobutanoic acid or an ester thereof, and subsequent removal of the protecting group from the aldol compound and (optionally simultaneous) cyclizations and acetal formation under acidic conditions in the presence of an alcohol, followed by optional isolation of the desired compounds. The invention also relates to compounds according to formulae [Xl] and [XII].