The present invention provides a compound represented by the formula
wherein A represents (1) a bond, (2) a group represented by the formula -CRa=CRb- (Ra and Rb each represent a hydrogen atom or C1-6 alkyl) and the like; R1 represents (1) cyano or (2) an optionally esterified or amidated carboxyl group; R2 represents
(1) a hydrogen atom, (2) an optionally substituted hydroxy group,
(3) an optionally substituted amino group and the like; R3 and R4 each represent a hydrogen atom and the like; R5 represents a hydrogen atom and the like; R6 represents an optionally substituted hydroxy group and the like; R7and R8 each represent an optionally substituted hydrocarbon group and the like; R9 and R10 each represent (1) a hydrogen atom and the like; Y represents an optionally substituted methylene group; and n represents 0 or 1, or a salt thereof, which has an excellent phosphodiesterase IV inhibiting action.
Chromatography-Free Wittig Reactions Using a Bifunctional Polymeric Reagent
作者:Peter Shu-Wai Leung、Yan Teng、Patrick H. Toy
DOI:10.1021/ol1021614
日期:2010.11.5
The first example of a polystyrene bearing two distinct reagent groups has been prepared. This phosphine and amine functionalized material was used in one-pot Wittig reactions with an aldehyde and either an α-halo-ester, -ketone, or -amide. Due to the heterogeneous nature of the polymer, the desired alkene product of these reactions could be isolated in excellent yield in essentially pure form after
申请人:HELMHOLTZ-ZENTRUM FÜR INFEKTIONSFORSCHUNG GMBH
公开号:US11034648B2
公开(公告)日:2021-06-15
The present invention relates to novel derivatives of cystobactamides of formula (Ib) and the use thereof for the treatment or prophylaxis of bacterial infections.
本发明涉及式(Ib)胱内酰胺的新型衍生物及其在治疗或预防细菌感染中的应用。
Synthesis of α,β-Disubstituted Acrylates via Galat Reaction
作者:Tania Xavier、Sylvie Condon、Christophe Pichon、Erwan Le Gall、Marc Presset
DOI:10.1021/acs.orglett.9b02291
日期:2019.8.2
Galat reactions between aldehydes and substituted malonic acids half oxyester were found to be efficiently catalyzed by morpholine in refluxing toluene. This transformation allows the stereoselective synthesis of diverse alpha,beta-disubstituted acrylates in moderate to good yields. This method constitutes an attractive alternative to existing methods in terms of scope and eco-compatibility.
Synthesis of (E)-α,β-Unsaturated Esters and Amides with Total Selectivity Using Samarium Diiodide
作者:José M. Concellón、Juan A. Pérez-Andrés、Humberto Rodríguez-Solla