Direct Conversion of N-Methoxy-N-methylamides (Weinreb Amides) to Ketones via a Nonclassical Wittig Reaction
摘要:
N-Methoxy-N-methylamides (Weinreb amides) are converted efficiently into ketones by reaction with alkylidenetriphenylphosphoranes and in situ hydrolysis of the product.
Provided herein are food products, ingredients, beverages, and the like, comprising a peptide analog that contains one or more ethoid bonds, along with methods for preparing such peptide analogs, related compositions, and the ethoid peptide analogs themselves. The ethoid compounds described are useful as food ingredients, such as sweeteners, flavor enhancers and taste-modifying agents.
NOVEL PEPTIDES AS NS3-SERINE PROTEASE INHIBITORS OF HEPATITIS C VIRUS
申请人:Saksena Anil K.
公开号:US20110117057A1
公开(公告)日:2011-05-19
The present invention discloses novel compounds which have HCV protease inhibitory activity as well as methods for preparing such compounds. In another embodiment, the invention discloses pharmaceutical compositions comprising such compounds as well as methods of using them to treat disorders associated with the HCV protease.
Enantioselective Synthesis of α-Chiral Amides by Catalytic Hydrogenation with Iridium N,P-Complexes
作者:Bram B. C. Peters、Norman Birke、Pher G. Andersson、Luca Massaro
DOI:10.1055/s-0042-1751399
日期:——
The catalytic asymmetric hydrogenation of olefins constitutes a powerful method for the preparation of chiral compounds. A series of prochiral unsaturated amides were efficiently reduced with high enantioselectivities by means of an iridium N,P-complex-catalyzed hydrogenation. Its application in the synthesis of fenpropidin and the possibility of using isomeric mixtures of starting materials are attractive
Highly Enantioselective Construction of the α-Chiral Center of Amides<i>via</i>Iridium-Catalyzed Hydrogenation of α,β-Unsaturated Amides
作者:Wei-Jing Lu、Xue-Long Hou
DOI:10.1002/adsc.200900080
日期:2009.6
Abstractmagnified imageThe chiral center at the α‐position of amides is installed in excellent enantioselectivity via the iridium‐catalyzed asymmetric hydrogenation of α,β‐unsaturated amides under mild conditions. Even aliphatic amides are suitable substrates. The presence of a hydrogen atom on the nitrogen of the amide is important for the enantioselectivity of the reaction.