Allylation of Erythromycin Derivatives: Introduction of Allyl Substituents into Highly Hindered Alcohols
摘要:
Functionalized erythromycin 9-oxime derivatives are 6-O-allylated under mild conditions using substituted allyl tert-butyl carbonates under palladium(0) catalysis. This allylation works well where traditional ether-forming protocols function poorly. Allyl tert-butyl carbonates provide higher yields in this reaction than lesser substituted carbonates such as ethyl or isopropyl. Aryl-substituted allyl carbonates or carbamates may be employed as well and, when used, produce trans-olefinic products.
Allylation of Erythromycin Derivatives: Introduction of Allyl Substituents into Highly Hindered Alcohols
摘要:
Functionalized erythromycin 9-oxime derivatives are 6-O-allylated under mild conditions using substituted allyl tert-butyl carbonates under palladium(0) catalysis. This allylation works well where traditional ether-forming protocols function poorly. Allyl tert-butyl carbonates provide higher yields in this reaction than lesser substituted carbonates such as ethyl or isopropyl. Aryl-substituted allyl carbonates or carbamates may be employed as well and, when used, produce trans-olefinic products.
Preparation of quinoline-substituted carbonate and carbamate derivatives
申请人:——
公开号:US20020013468A1
公开(公告)日:2002-01-31
The invention relates to a process for preparing quinoline-substituted carbonate and carbamate compounds, which are important intermediates in the synthesis of 6-O-substituted macrolide antibiotics. The process employs metal-catalyzed coupling reactions to provide a carbonate or carbamate of formula (I) or (II) or a substrate that can be reduced to obtain the same.
[EN] PROCESS FOR PREPARING 6-O-SUBSITUTED ERYTHROMYCIN DERIVATIVES<br/>[FR] METHODE DE PREPARATION DE DERIVES D'ERYTHROMYCINE SUBSTITUES EN 6-O
申请人:ABBOTT LAB
公开号:WO2000078773A2
公开(公告)日:2000-12-28
In one aspect, the invention relates to a process for preparing 6-O-substituted erythromycin derivatives comprising reacting 2'-substituted and optionally 4'-substituted 9-oxime erythromycin derivatives with an alkylating agent in the presence of a palladium catalyst and phosphine. In another aspect, the invention relates to processes for preparing 6-O-substituted erythromycin ketolides using the palladium-catalyzed alkylation reaction.
[EN] PREPARATION OF QUINOLINE-SUBSTITUTED CARBONATE AND CARBAMATE DERIVATIVES<br/>[FR] PREPARATION DE DERIVES DE CARBONATE ET DE CARBAMATE A SUBSTITUTION QUINOLINE
申请人:ABBOTT LAB
公开号:WO2001000582A1
公开(公告)日:2001-01-04
The invention relates to a process for preparing quinoline-substituted carbonate and carbamate compounds, which are important intermediates in the synthesis of 6-O-substituted macrolide antibiotics. The process employs metal-catalyzed coupling reactions to provide a carbonate or carbamate of formula (I) or (II) or a substrate that can be reduced to obtain the same.
Process for preparing 6-o-substituted erythromycin derivatives
申请人:Abbott Laboratories
公开号:US06437106B1
公开(公告)日:2002-08-20
In one aspect, the invention relates to a process for preparing 6-O-substituted erythromycin derivatives comprising reacting 2′-substituted and optionally 4″-substituted 9-oxime erythromycin derivatives with an alkylating agent in the presence of a palladium catalyst and phosphine. In another aspect, the invention relates to processes for preparing 6-O-substituted erythromycin ketolides using the palladium-catalyzed alkylation reaction.
Preparation of substituted carbonate and carbamate derivatives
申请人:Abbott Laboratories
公开号:EP2409964A2
公开(公告)日:2012-01-25
The invention relates to a process for preparing carbonate and carbamate compounds, which are important intermediates in the synthesis of 6-O-substituted macrolide antibiotics. The process employs metal-catalyzed coupling reactions to provide a carbonate or carbamate of formula (I) or a substrate that can be reduced to obtain the same.
R1-CH=CHCH2OC(O)-X-R2 (I)