The addition of amines to diisobutylaluminum-imine complexes. Preparation of NPS R-568 Hydrochloride
摘要:
A facile procedure for the preparation of secondary and tertiary amines from nitriles has been developed. The addition of amines to diisobutylaluminum-imine complexes derived by treating nitriles with DIBAL-H was found to proceed in moderate to good yields and was used to prepare NPS R-568 (1) hydrochloride, a potent calcium receptor agonist. (C) 1998 Elsevier Science Ltd. All rights reserved.
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
Trichlorosilane-Dimethylformamide (Cl<sub>3</sub>SiH-DMF) as an Efficient Reducing Agent. Reduction of Aldehydes and Imines and Reductive Amination of Aldehydes under Mild Conditions Using Hypervalent Hydridosilicates
作者:Shu Kobayashi、Masaru Yasuda、Iwao Hachiya
DOI:10.1246/cl.1996.407
日期:1996.5
Trichlorosilane-dimethylformamide (Cl3SiH-DMF) was found to be an effective reducing agent for reduction of aldehydes to alcohols, imines to amines, and also reductiveamination of aldehydes. Hypervalent silicates are active species, which enable efficientreduction under mild conditions.
Diethylsilane exhibits remarkable reactivity relative to typical hydrosilanes in the reduction of carbonyl compounds, imines, and amides catalyzed by Au nanoparticles.
Intramolecular C−H Amination of
<i>N</i>
‐Alkylsulfamides by
<i>tert</i>
‐Butyl Hypoiodite or
<i>N</i>
‐Iodosuccinimide
作者:Kensuke Kiyokawa、Keisuke Jou、Satoshi Minakata
DOI:10.1002/chem.202102635
日期:2021.10.7
1,3-Diamines are an important class of compounds that are broadly found in natural products and are also widely used as building blocks in organic synthesis. Although the intramolecular C−H amination of N-alkylsulfamide derivatives is a reliable method for the construction of 1,3-diamine structures, the majority of these methods involve the use of a transition-metal catalyst. We herein report on a