Cerium ammonium nitrate (CAN) for mild and efficient reagent to remove hydroxyethyl units from 2-hydroxyethyl ethers and 2-hydroxyethyl amines
摘要:
Cerium ammonium nitrate (CAN) removed hydroxyethyl units from 2-hydroxyethyl ethers and 2-hydroxyethyl amines to produce alcohols and amines in good yields. Especially, removal of the 2-hydroxyethyl ethers from C-2-symmetric diols, chiral 2,3-butanediol and chiral hydrobenzoin, was very useful for asymmetric syntheses using C-2-symmetric diols. The reactions using dual abilities of CAN, i.e., the ability for removal of the 2-hydroxyethyl unit and the ability for acetal hydrolysis by a single electron transfer, were also achieved Successfully. The reaction conditions were very mild and efficient, and many functional groups, which can be affected under normal conditions, were unaffected during the reaction. (c) 2006 Published by Elsevier Ltd.
Integrated Electro‐Biocatalysis for Amine Alkylation with Alcohols
作者:Itziar Peñafiel、Robert A. W. Dryfe、Nicholas J. Turner、Michael F. Greaney
DOI:10.1002/cctc.202001757
日期:2021.2.5
combined process offers a new approach to amine alkylation with native alcohols, a key bond formation in the chemical economy that is currently achieved via precious metal‐catalyzed hydrogen‐borrowing technologies. The electrobio transformation is effective for primary and secondary alcohols undergoing coupling with allyl, propargyl, benzyl, and cyclopropyl amines, and has been adapted for use with solid‐supported
Biocatalytic <i>N</i>-Alkylation of Amines Using Either Primary Alcohols or Carboxylic Acids via Reductive Aminase Cascades
作者:Jeremy I. Ramsden、Rachel S. Heath、Sasha R. Derrington、Sarah L. Montgomery、Juan Mangas-Sanchez、Keith R. Mulholland、Nicholas J. Turner
DOI:10.1021/jacs.8b11561
日期:2019.1.23
The alkylation of amines with either alcohols or carboxylic acids represents a mild and safe alternative to the use of genotoxic alkyl halides and sulfonate esters. Here we report two complementary one-pot systems in which the reductive aminase (RedAm) from Aspergillus oryzae is combined with either (i) a 1° alcohol/alcohol oxidase (AO) or (ii) carboxylic acid/carboxylic acid reductase (CAR) to affect
A General Acid‐Mediated Hydroaminomethylation of Unactivated Alkenes and Alkynes
作者:Daniel Kaiser、Veronica Tona、Carlos R. Gonçalves、Saad Shaaban、Alberto Oppedisano、Nuno Maulide
DOI:10.1002/anie.201906910
日期:2019.10.7
its considerable potential to streamline amine synthesis. State-of-the-art protocols for hydroaminomethylation of alkenes rely largely on transition-metal catalysis, enabling this transformation only under highly designed and controlled conditions. Here we report a broadly applicable, acid-mediated approach to the hydroaminomethylation of unactivated alkenes and alkynes. This methodology employs cheap
[EN] NOVEL (R) AND RAC 3-(2-(ALLYLOXY)-5-METHYLPHENYL)-N,N-DIISOPROPYL-3- PHENYLPROPAN-1-AMINE AND ITS USE FOR SYNTHESIS OF (R) AND RAC-2-(3- (DIISOPROPYLAMINO)-1-PHENYLPROPYL)-4-(HYDROXYMETHYL)PHENOL<br/>[FR] NOUVEAU (R) ET 3-(2-(ALLYLOXY)-5-MÉTHYLPHÉNYL)-N,N-DIISOPROPYL-3- PHÉNYLPROPAN-1-AMINE RACÉMIQUE ET SON UTILISATION POUR LA SYNTHÈSE DE (R) ET DE 2-(3- (DIISOPROPYLAMINO)-1-PHÉNYLPROPYL)-4-(HYDROXYMÉTHYL)PHÉNOL RACÉMIQUE
申请人:CELESTIS PHARMACEUTICALS PVT LTD
公开号:WO2017137955A1
公开(公告)日:2017-08-17
The present invention relates to novel chiral 3-(2-(allyloxy)-5-methylphenyl)-N,N-diisopropyl-3-phenylpropan-1-amine (5) and racemic 3-(2-(allyloxy)-5-methylphenyl)-N,N-diisopropyl-3-phenylpropan-1-amine () and its use in improved and industrially advantageous process for preparation of chiral and racemic form of 2-(3-(diisopropylamino)-1-phenylpropyl)-4-(hydroxymethyl)phenol. Further, present invention relates to preparation of the same.
Iron‐Catalysed Direct Aromatic Amination with
<i>N</i>
‐Chloroamines
作者:Gayle E. Douglas、Steven A. Raw、Stephen P. Marsden
DOI:10.1002/ejoc.201900614
日期:2019.9
optimized procedure for the direct intra‐ and intermolecular amination of aromatic C‐H bonds with aminium radicals generated from N‐chloroamines under iron catalysis is reported. A range of substituted tetrahydroquinolines could be readily prepared, while extension to the synthesis of benzomorpholines was more limited in scope. A direct one‐pot variant was developed, allowing direct formal oxidative N‐H/C‐H