Origin of the <i>E</i>/<i>Z</i> Selectivity in the Synthesis of Tetrasubstituted Olefins by Wittig Reaction of α-Fluorophosphonium Ylides: An Explanation for the Low Stereoselectivity Observed in Reactions of α-Alkoxy Aldehydes
作者:Dominique Depré、Wim A. A. Vermeulen、Yolande Lang、Jean Dubois、Jan Vandevivere、Jeremy Vandermeersch、Longchuan Huang、Raphaël Robiette
DOI:10.1021/acs.orglett.7b00344
日期:2017.3.17
96/4) by Wittig reactionbetween α-heterosubstituted ketones and α-fluorophosphonium ylides. A detailed study of factors that control stereoselectivity in these reactions shows that stereoselectivity is the result of stabilizing CH···F and N···C═O interactions in the addition TS leading to the E isomer. This analysis provides a rationale for the observed decrease in selectivity for reactions of stabilized
Disclosed are novel triazole derivatives. Exhibiting excellent antifungal activity and in vivo safety, they are useful for the treatment or prevention of fungal infections caused by a wide spectrum of fungi.
[EN] ACYLAMINO-SUBSTITUTED CYCLIC CARBOXYLIC ACID DERIVATIVES AND THEIR USE AS PHARMACEUTICALS<br/>[FR] DÉRIVÉS CYCLIQUES ACYLAMINO-SUBSTITUÉS DE L'ACIDE CARBOXYLIQUE ET LEUR UTILISATION EN TANT QUE PRODUITS PHARMACEUTIQUES
申请人:SANOFI AVENTIS
公开号:WO2011053948A1
公开(公告)日:2011-05-05
The present invention relates to compounds of the formula (I) wherein A, Y, Z, R20 to R22 and R50 have the meanings indicated in the claims, which are valuable pharmaceutical active compounds. Specifically, they are inhibitors of the endothelial differentiation gene receptor 2 (Edg-2, EDG2), which is activated by lysophosphatidic acid (LPA) and is also termed as LPA1 receptor, and are useful for the treatment of diseases such as atherosclerosis, myocardial infarction and heart failure, for example. The invention furthermore relates to processes for the preparation of the compounds of the formula (I), their use and pharmaceutical compositions comprising them.
[EN] 3-PIPERIDONE COMPOUNDS AND THEIR USE AS NEUROKININ-1 (NK1) RECEPTOR ANTAGONISTS<br/>[FR] COMPOSÉS DE 3-PIPÉRIDONE ET LEUR UTILISATION À TITRE D'ANTAGONISTES DU RÉCEPTEUR DE NEUROKININE-1 (NK1)
申请人:UNIV NANYANG TECH
公开号:WO2014142761A1
公开(公告)日:2014-09-18
The invention relates to 3-piperidone compounds, and in particular, to (2S)-phenyl-3-piperidone and its synthesis method. Use of the thus-synthesized 3-piperidone compounds as potent neurokinin-1 (NK1) receptor antagonists is also provided.
Process for the synthesis of (2S)-phenyl-3-piperidone
申请人:——
公开号:US20020019532A1
公开(公告)日:2002-02-14
The present invention is concerned with novel processes for the preparation of (2S)-phenyl-3-piperidone. This compound is useful as an intermediate in the synthesis of compounds which possess pharmacological activity.