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
Cesium Effect: High Chemoselectivity in Direct N-Alkylation of Amines
作者:Ralph Nicholas Salvatore、Advait S. Nagle、Kyung Woon Jung
DOI:10.1021/jo010643c
日期:2002.2.1
A novel method for the mono-N-alkylation of primary amines, diamines, and polyamines was developed using cesium bases in order to prepare secondaryamines efficiently. A cesium base not only promoted alkylation of primary amines but also suppressed overalkylations of the produced secondaryamines. Various amines, alkyl bromides, and alkyl sulfonates were examined, and the results demonstrated this
Multifunctional biocatalyst for conjugate reduction and reductive amination
作者:Thomas W. Thorpe、James R. Marshall、Vanessa Harawa、Rebecca E. Ruscoe、Anibal Cuetos、James D. Finnigan、Antonio Angelastro、Rachel S. Heath、Fabio Parmeggiani、Simon J. Charnock、Roger M. Howard、Rajesh Kumar、David S. B. Daniels、Gideon Grogan、Nicholas J. Turner
DOI:10.1038/s41586-022-04458-x
日期:2022.4.7
reductase (IRED) collection3 and originating from an unclassified Pseudomonas species, possesses an unusual active site architecture that facilitates amine-activated conjugate alkene reduction followed by reductiveamination. This enzyme can couple a broad selection of α,β-unsaturated carbonyls with amines for the efficient preparation of chiral amine diastereomers bearing up to three stereocentres. Mechanistic
Direct Alkylation of Amines with Primary and Secondary Alcohols through Biocatalytic Hydrogen Borrowing
作者:Sarah L. Montgomery、Juan Mangas-Sanchez、Matthew P. Thompson、Godwin A. Aleku、Beatriz Dominguez、Nicholas J. Turner
DOI:10.1002/anie.201705848
日期:2017.8.21
The reductive aminase from Aspergillus oryzae (AspRedAm) was combined with a single alcohol dehydrogenase (either metagenomic ADH‐150, an ADH from Sphingobium yanoikuyae (SyADH), or a variant of the ADH from Thermoanaerobacter ethanolicus (TeSADH W110A)) in a redox‐neutral cascade for the biocatalytic alkylation of amines using primary and secondary alcohols. Aliphatic and aromatic secondary amines
Three-Component Stereoselective Enzymatic Synthesis of Amino-Diols and Amino-Polyols
作者:Grayson J. Ford、Christopher R. Swanson、Ruth T. Bradshaw Allen、James R. Marshall、Ashley P. Mattey、Nicholas J. Turner、Pere Clapés、Sabine L. Flitsch
DOI:10.1021/jacsau.2c00374
日期:2022.10.24
strategies. Here we present a three-component strategy for the stereoselective enzymatic synthesis of amino-diols and amino-polyols using a diverse set of prochiral aldehydes, hydroxy ketones, and amines as starting materials. We were able to combine biocatalytic aldol reactions, using variants of d-fructose-6-phosphate aldolase (FSA), with reductive aminations catalyzed by IRED-259, identified from a metagenomic
氨基多元醇代表了有吸引力的化学结构单元,但由于不对称官能团的高密度和需要广泛的保护基策略,合成起来可能具有挑战性。在这里,我们提出了一种使用多种前手性醛、羟基酮和胺作为起始材料的立体选择性酶促合成氨基二醇和氨基多元醇的三组分策略。我们能够结合使用 d-果糖-6-磷酸醛缩酶 (FSA) 变体的生物催化醛缩反应与IRED -259 催化的还原胺化反应,从宏基因组文库中鉴定。开发了一种不需要中间体分离的两步法,以避免羰基组分的交叉反应。2 R ,3的立体选择性形成氨基多元醇的R ,4 R对映异构体通过 X 射线晶体学观察和证实。