PEPTIDE PURIFICATION METHOD USING SULFONATE COMPOUND
申请人:Nagase & Co., Ltd.
公开号:EP3851446A1
公开(公告)日:2021-07-21
The present application provides a method for purifying a target peptide, comprising mixing a peptide product obtained through a peptide synthesis with a solvent in the presence of a sulfonic acid compound to obtain a solid; and performing a solid-liquid separation to collect the solid.
Conjugate phenylselenolactonization coupled with allylic selenoxide rearrangement for functionalizing dienylacetic acids
作者:Anthony J. Pearson、Tapan Ray、Ian C. Richards、Jon Clardy、Linda Silveira
DOI:10.1016/s0040-4039(00)94212-6
日期:1983.1
Systems Chemistry: Kinetic and Computational Analysis of a Nearly Exponential Organic Replicator
作者:Maik Kindermann、Insa Stahl、Malte Reimold、Wolf Matthias Pankau、Günter von Kiedrowski
DOI:10.1002/anie.200501527
日期:2005.10.21
Application of O2-DMSO as Reoxidant in the Pd(II)-Catalyzed 1,4-Oxidation of 5-Substituted 1,3-Cyclohexadienes.
作者:Magnus Rönn、Pher G. Andersson、Jan-E. Bäckvall、Markku Ahlgrén、Ward T. Robinson、Bryan R. Wood、Ward T. Robinson、Björn O. Roos、Claire Vallance、Bryan R. Wood
DOI:10.3891/acta.chem.scand.51-0773
日期:——
Palladium-catalyzed oxidation of 5-substituted 1,3-cyclohexadienes carrying a nucleophilic group in the side chain employing O-2-DMSO as the oxidant gave cyclization via 1,4-addition to the 1,3-diene. The nucleophilic groups employed were tosylamido and carboxy. In the reaction Pd-II is most likely reduced to colloidal Pd-0 which is subsequently reoxidized by O-2. The solvent DMSO prevents precipitation of metallic palladium by coordination to the colloidal particles. The stereochemistry of the palladium-catalyzed intramolecular 1,4-oxidation was controlled to some extent by the nature of the external nucleophile. Thus, in the intramolecular 1,4-oxyacyloxylation of 1 (hydroxy as nucleophile in the side chain) it was possible to direct the 1,4-addition towards cis or trans stereochemistry by variation of the external carboxylate nucleophile.
Stereocontrolled lactonization reactions via palladium-catalyzed 1,4-addition to conjugated dienes
作者:Jan E. Baeckvall、Kenneth L. Granberg、Pher G. Andersson、Roberto Gatti、Adolf Gogoll