New Approach to 1,4-Benzoxazin-3-ones by Electrochemical C−H Amination
作者:Lars Julian Wesenberg、Sebastian Herold、Akihiro Shimizu、Jun-ichi Yoshida、Siegfried R. Waldvogel
DOI:10.1002/chem.201701979
日期:2017.9.7
the synthesis of benzoxazinones requires transition‐metal catalysts and pre‐functionalized substrates such as arylhalides. However, the anodic C−H amination of phenoxy acetates offers a very efficient and sustainable access to these heterocycles. The presented electrochemical protocol can be applied to a broadscope of alkylated substrates. Even tert‐butyl moieties or halogen substituents are compatible
Process for preparing isomerically pure prodrugs of proton pump inhibitors
申请人:Garst E. Michael
公开号:US20050038076A1
公开(公告)日:2005-02-17
Synthetic methods for preparing isomerically pure N-arylsulfonyl derivatives of proton pump inhibitors which include a substituted benzimidazole nucleus are shown by the synthetic schemes and experimental description.
Prodrugs of proton pump inhibitors of Formulas 1 through 4,
1
where the symbols are as defined in the specification, and the R group includes at least one acidic group or its pharmaceutically acceptable salt, have improved aqueous solubility and bioavailability.
Prodrugs of proton pump inhibitors background of the invention
申请人:Garst Michael
公开号:US20050143423A1
公开(公告)日:2005-06-30
Prodrugs of proton pump inhibitors of Formulas 1 through 4,
where the symbols are as defined in the specification, and the R group includes at least one acidic group or its pharmaceutically acceptable salt, have improved aqueous solubility and bioavailability.