Carboxylic Acids as A Traceless Activation Group for Conjugate Additions: A Three-Step Synthesis of (±)-Pregabalin
作者:Lingling Chu、Chisa Ohta、Zhiwei Zuo、David W. C. MacMillan
DOI:10.1021/ja505964r
日期:2014.8.6
carboxylic acids as a traceless activation group for radical Michael additions has been accomplished via visible light-mediated photoredox catalysis. Photon-induced oxidation of a broad series of carboxylic acids, including hydrocarbon-substituted, α-oxy, and α-amino acids, provides a versatile CO2-extrusion platform to generate Michael donors without the requirement for organometallic activation or propagation
羧酸作为自由基迈克尔加成的无痕活化基团的直接应用是通过可见光介导的光氧化还原催化实现的。光子诱导氧化一系列广泛的羧酸,包括碳氢化合物取代的、α-氧基和 α-氨基酸,提供了一个多功能的 CO2 挤出平台来生成迈克尔供体,而无需有机金属活化或传播。多种迈克尔受体适用于这种新的共轭加成策略。还介绍了该技术在药物普瑞巴林(由辉瑞以商品名 Lyrica 商业化)的三步合成中的应用。
Naphthochromenones: Organic Bimodal Photocatalysts Engaging in Both Oxidative and Reductive Quenching Processes
is accessible using simple visible light irradiation sources (CFL or LED). Their excited-state redox potentials, PC*/PC.- (up to 1.65 V) and PC.+ /PC* (up to -1.77 V vs. SCE), are such that these novel PCs can engage in both oxidative and reductive quenching mechanisms with strong thermodynamic requirements. The potential of these bimodal PCs was benchmarked in synthetically relevant photocatalytic processes
以克为单位合成了十二种萘并萘醌光催化剂(PCs)。它们在紫外线/可见光范围内吸收,并具有极宽的氧化还原窗口(高达3.22 eV),可通过简单的可见光照射源(CFL或LED)进行访问。它们的激发态氧化还原电势PC * / PC.-(高达1.65 V)和PC。+ / PC *(相对于SCE高达-1.77 V),使得这些新型PC既可以进行氧化也可以进行还原具有强烈的热力学要求的淬火机理。这些双峰PC的潜力已在具有极端热力学要求的合成相关光催化工艺中进行了基准测试。它们有效催化机理上相反的氧化/还原光反应的能力是这些有机光催化剂的独特功能,因此代表了在通用性,可持续性,
[EN] DECARBOXYLATIVE CONJUGATE ADDITIONS AND APPLICATIONS THEREOF<br/>[FR] ADDITIONS DE CONJUGUÉS AVEC DÉCARBOXYLATION ET APPLICATIONS ASSOCIÉES
申请人:UNIV PRINCETON
公开号:WO2016196931A1
公开(公告)日:2016-12-08
Synthetic methods are described herein operable to efficiently produce a wide variety of molecular species through conjugate additions via decarboxylative mechanisms. For example, methods of functionalization of peptide residues are described, including selective functionalization of peptide C-terminal residues. In one aspect, a method of peptide functionalization comprises providing a reaction mixture including a Michael acceptor and a peptide and coupling the Michael acceptor with the peptide via a mechanism including decarboxylation of a peptide reside.
Discovery of a Covalent Triazine Framework Photocatalyst for Visible-Light-Driven Chemical Synthesis using High-Throughput Screening
作者:Sriram Vijayakrishnan、John W. Ward、Andrew I. Cooper
DOI:10.1021/acscatal.2c02743
日期:2022.8.19
pathways under mild conditions. However, to date, most photocatalysts available to synthetic chemists are homogeneous metal complexes or organic dyes, which raise issues of cost, recyclability, and waste production. Here we report the discovery of a covalent triazine framework photocatalyst (CTF-2) for decarboxylative conjugate addition of a range of carboxylic acids under visible-light irradiation. The
DECARBOXYLATIVE CONJUGATE ADDITIONS AND APPLICATIONS THEREOF
申请人:The Trustees of Princeton University
公开号:US20180179248A1
公开(公告)日:2018-06-28
Synthetic methods are described herein operable to efficiently produce a wide variety of molecular species through conjugate additions via decarboxylative mechanisms. For example, methods of functionalization of peptide residues are described, including selective functionalization of peptide C-terminal residues. In one aspect, a method of peptide functionalization comprises providing a reaction mixture including a Michael acceptor and a peptide and coupling the Michael acceptor with the peptide via a mechanism including decarboxylation of a peptide reside.