[Pd]-Catalyzed Intermolecular Coupling and Acid Mediated Intramolecular Cyclodehydration: One-Pot Synthesis of Indenes
作者:Pedireddi Niharika、Gedu Satyanarayana
DOI:10.1002/ejoc.201701622
日期:2018.2.28
An efficient one‐pot synthesis of indenes from simple starting materials is presented. This process involves a dual C–C bond formation by intermolecular Heck coupling followed by acid‐mediated intramolecular cyclodehydration. In addition, the regioselective synthesis of benzyl styrenes through in‐situ reduction of Heck products (ketones) followed by acid‐mediated dehydration is presented.
Ir-Catalyzed α-Alkylation of Ketones with Alcohols: One-Step Access to Donepezil
作者:Sen Wang、Rui Miao、Lu Ouyang、Yanping Xia、Yifei Wei、Renshi Luo
DOI:10.1055/a-1894-8826
日期:2022.12
We demonstrate an iridium-catalyzed alkylation of ketones with alcohols, which enables one-step access to donepezil, cyclic ketones, and linear ketones in high yields. A scale-up experiment shows the excellent practicability of this protocol. Comparative experiments show that a small amount of water is beneficial to the improvement of product yield.
[DE] PHENETHYL-, PHENETHYLEN-, PHENETIN- UND INDANONDERIVATE IN KOSMETISCHEN ZUBEREITUNGEN, INSBESONDERE ZUR VERWENDUNG BEI HAUTALTERUNGSPROZESSEN<br/>[EN] PHENETHYL, PHENETHYLENE, PHENETHYNE AND INDANONE DERIVATES IN COSMETIC FORMULATIONS, ESPECIALLY FOR USE IN SKIN AGEING PROCESSES<br/>[FR] DÉRIVÉS DE PHÉNYLÉTHYLE, DE PHÉNYLÉTHYLÈNE, DE PHÉNYLÉTHYNE ET D'INDANONE DANS DES PRÉPARATIONS COSMÉTIQUES, NOTAMMENT UTILISÉES POUR LUTTER CONTRE DES PROCESSUS DE VIEILLISSEMENT DE LA PEAU
申请人:MERCK PATENT GMBH
公开号:WO2012016619A1
公开(公告)日:2012-02-09
Die Erfindung betrifft die Verwendung einer oder mehrerer Verbindungen, insbesondere die Verwendung von Phenethyl-, Phenethylen- und Phenethinderviaten, als Wirkstoffvorstufe in einer topischen Formulierung, dadurch gekennzeichnet, dass sich die Verbindung nach Applikation in einen Wirkstoff umwandelt, der in der Formulierung schlechter löslich ist als die Wirkstoffvorstufe, sowie Zusammensetzungen enthaltend Phenethyl-, Phenethylen, Phenethin- und Indanonderviate.
Direct conversion of secondary propargyl alcohols into 1,3-di-arylpropanone <i>via</i> DBU promoted redox isomerization and palladium assisted chemoselective hydrogenation in a single pot operation
作者:Rimpa De、S. Antony Savarimuthu、Shubhadeep Chandra、Mrinal K. Bera
DOI:10.1039/d1nj02972j
日期:——
Palladium(II)acetate is found to be an efficient catalyst for the single-step conversion of secondary propargyl alcohols to 1,3-diarylpropanone derivatives under mild basic conditions. The reaction is believed to proceed via redox isomerisation of secondary propargyl alcohols followed by chemoselective reduction of an enone double bond with formic acid as an adequate hydrogen donor. A large number
发现乙酸钯 ( II ) 是一种有效的催化剂,可在温和的碱性条件下将仲炔醇一步转化为 1,3-二芳基丙酮衍生物。据信,该反应通过仲炔丙醇的氧化还原异构化,然后用甲酸作为适当的氢供体对烯酮双键进行化学选择性还原而进行。大量的 1,3-二芳基丙酮衍生物可以很容易地从毫克级到几克级制备。