Effective Procedure for the Oxidative Cleavage of Olefins by OsO4-NaIO4
摘要:
Oxidative cleavage of olefins by OsO4-NaIO4 sometimes suffers from low yields due to the formation of side products. It is reported that the addition of pyrimidine can suppress the side reactions and dramatically improve the yield of this classic reaction.
The present invention relates to impurities of donepezil, or a pharmaceutically acceptable salt thereof, which may be produced during synthesis and storage of donepezil, or a pharmaceutically-acceptable salt thereof, and to methods of identifying such impurities. The invention also relates to the use of these impurities in analytical techniques and to product that contain certain low levels of these impurities in particular the following impurities are disclosed: formula (I) and formula (II).
[EN] IMPURITIES OF DONEPEZIL<br/>[FR] IMPURETÉS DU DONÉPÉZIL
申请人:PLIVA ISTRAZIVANJE I RAZVOJ D
公开号:WO2007135408A1
公开(公告)日:2007-11-29
[EN] The present invention relates to impurities of donepezil, or a pharmaceutically acceptable salt thereof, which may be produced during synthesis and storage of donepezil, or a pharmaceutically-acceptable salt thereof, and to methods of identifying such impurities.The invention also relates to the use of these impurities in analytical techniques and to product that contain certain low levels of these impurities in particular the following impurities are disclosed: formula (I) and formula (II). [FR] La présente invention concerne des impuretés du donépézil ou de l'un de ses sels pharmaceutiquement acceptables, lesdites impuretés pouvant être produites pendant la synthèse et le stockage du donépézil ou de son sel pharmaceutiquement acceptable. L'invention concerne également des procédés permettant d'identifier de telles impuretés et l'utilisation desdites impuretés dans le cadre de techniques analytiques, ainsi que des produits contenant des teneurs faibles de ces impuretés, notamment les impuretés suivantes :
Effective Procedure for the Oxidative Cleavage of Olefins by OsO4-NaIO4
作者:Hong Woo Lee、Choong Leol Yoo、Seung Uk Lee、Sung Kwon Kang
DOI:10.3987/com-09-11689
日期:——
Oxidative cleavage of olefins by OsO4-NaIO4 sometimes suffers from low yields due to the formation of side products. It is reported that the addition of pyrimidine can suppress the side reactions and dramatically improve the yield of this classic reaction.