Kinetic Study of the Phenolysis of Bis(4-nitrophenyl) Carbonate, Bis(4-nitrophenyl) Thionocarbonate, and Methyl 4-Nitrophenyl Thionocarbonate
作者:Enrique A. Castro、Mauricio Angel、David Arellano、José G. Santos
DOI:10.1021/jo0101252
日期:2001.10.1
The reactions of a homogeneous series of phenols with bis(4-nitrophenyl) carbonate (BNPC), bis(4-nitrophenyl) thionocarbonate (BNPTOC), and methyl 4-nitrophenyl thionocarbonate (MNPTOC) are subjected to a kinetic investigation in water, at 25.0 degrees C and ionic strength of 0.2 M (KCl). Under excess of phenol over the substrate, all the reactions obey pseudo-first-order kinetics and are first order
DIRECT CONVERSION OF PHENOLS INTO AMIDES AND ESTERS OF BENZOIC ACID
申请人:Alabugin Igor
公开号:US20110237798A1
公开(公告)日:2011-09-29
A method is provided for the preparation of an aromatic carboxylic acid aryl ester or an N-aryl aromatic carboxamide. The method comprises contacting an O,O-diaryl thiocarbonate or an O-aryl-N-aryl thiocarbamate with a reactant that regioselectively reacts with sulfur, which contact causes an O-neophyl rearrangement, thereby forming either the aromatic carboxylic acid aryl ester or the N-aryl aromatic carboxamide, respectively.
Core-Modified Terpene Trilactones From Ginkgo Biloba Extract and Biological Evaluation Thereof
申请人:Nakanishi Koji
公开号:US20090221019A1
公开(公告)日:2009-09-03
Lactone-rings of ginkgolides are converted into the corresponding tetrahydrofuran moieties via DIBAL-H reduction followed by deoxygenation of the formed lactols with Et
3
SiH/BF
3
Et
2
O producing a series of lactol-free ginkgolides. The present invention also relates to synthesis of hydroxyl-free, or hydroxyl-free and lactone-free, ginkgolides and bilobalides.
[EN] CORE-MODIFIED TERPENE TRILACTONES FROM GINKGO BILOBA EXTRACT AND BIOLOGICAL EVALUATION THEREOF<br/>[FR] TRILACTONES TERPENIQUES D'EXTRAIT DE GINKGO BILOBA A NOYAU MODIFIE ET EVALUATION BIOLOGIQUE DESDITES TRILACTONES
申请人:UNIV COLUMBIA
公开号:WO2007002410A2
公开(公告)日:2007-01-04
[EN] Lactone-rings of ginkgolides are converted into the corresponding tetrahydrofuran moieties via DIBAL-H reduction followed by deoxygenation of the formed lactols with Et3SiH/BF3Et2O producing a series of lactol-free ginkgolides. The present invention also relates to synthesis of hydroxyl-free, or hydroxyl-free and lactone- free, ginkgolides and bilobalides . [FR] Des anneaux de lactone de ginkgolides sont convertis en parties tétrahydrofurane correspondantes par une réduction par le DIBAL-H suivie d'une désoxygénation des lactols formés avec Et3SiH/BF3 Et2O produisant une série de ginkgolides sans lactol. La présente invention concerne également la synthèse de ginkgolides et de bilobalides sans hydroxyle ou sans hydroxyle et sans lactone.
[DE] ELEKTROCHEMISCHES VERFAHREN ZUR HERSTELLUNG VON ARYLALKYLCARBONATEN UND DIARYLCARBONATEN<br/>[EN] ELECTROCHEMICAL METHOD FOR PRODUCING ARYL ALKYL CARBONATES AND DIARYL CARBONATES<br/>[FR] PROCÉDÉ ÉLECTROCHIMIQUE POUR PRODUIRE DES ARYLALKYLCARBONATES ET DES DIARYLCARBONATES
申请人:COVESTRO DEUTSCHLAND AG
公开号:WO2018091370A1
公开(公告)日:2018-05-24
Es wird ein Verfahren zur elektrochemischen Herstellung von Arylalkyl carbonaten und Diarylcarbonaten beschrieben, bei dem aromatische Verbindungen anodisch mit Carbonaten umgesetzt werden sowie deren Verwendung zur Herstellung von Polycarbonat.