Organocatalytic Enantio- and Diastereoselective Construction of <i>syn</i>-1,3-Diol Motifs via Dynamic Kinetic Resolution of In Situ Generated Chiral Cyanohydrins
syn-1,3-dioxanes as protected 1,3-diols via dynamickineticresolution of in situ generated chiral cyanohydrins has been developed. This method involves a reversible cyanohydrin formation/hemiacetalization/intramolecular oxy-Michael addition reactioncascade, affording a chiral syn-1,3-diol structure with simultaneous construction of two stereogenic centers. The use of trifluoromethyl ketones is crucial
A new class of chiral smectic liquid crystals: substituted biphenylylcyclohexylidene ethanols having an axial chirality
作者:Guy Solladie、Richard Zimmermann
DOI:10.1021/jo00221a020
日期:1985.10
An Efficient Preparation of β-Aryl-β-ketophosphonates by the TFAA/H<sub>3</sub>PO<sub>4</sub>-Mediated Acylation of Arenes with Phosphonoacetic Acids
作者:George P. Luke、Christopher K. Seekamp、Zhe-Qing Wang、Bertrand L. Chenard
DOI:10.1021/jo800973e
日期:2008.8.1
[GRAPHICS]beta-Aryl-beta-ketophosphonates can be efficiently prepared in good yield by using a TFAA/85% H(3)PO(4)-mediated acylation of electron-rich arenes with phosphonoacetic acids. The conditions offer advantages over existing methods of preparing these useful compounds by not requiring the use of strong base, cryogenics, or an anhydrous and inert atmosphere. Furthermore, some functional groups not tolerated with the reaction conditions used in existing methods are compatible with the herein described conditions.
SOLLADIE, G.;ZIMMERMANN, R. G., ANGEW. CHEM., 1985, 97, N 1, 70-71
作者:SOLLADIE, G.、ZIMMERMANN, R. G.
DOI:——
日期:——
[EN] METHODS FOR PREPARING ARYL-SUBSTITUTED KETOPHOSPHONATES<br/>[FR] PROCÉDÉS DE PRÉPARATION DE CÉTOPHOSPHONATES SUBSTITUÉS PAR DES GROUPES ARYLE
申请人:NEUROGEN CORP
公开号:WO2008097483A2
公开(公告)日:2008-08-14
[EN] Methods are provided for the synthesis of aryl-substituted ketophosphonates of the Formula (I): wherein variables are as described herein. Such compounds are useful as reagents for olefination reactions, and as intermediates in the synthesis of certain biologically active agents. [FR] La présente invention a trait à des procédés de synthèse de cétophosphonates substitués par des groupes aryle de formule (I), dans laquelle les variables sont telles que décrites dans les présentes. Lesdits composés se révèlent utiles en tant que réactifs pour les réactions d'oléfination et en tant qu'intermédiaires dans la synthèse de certains agents biologiquement actifs.