Friedel–Crafts reactions catalyzed by samarium diiodide
作者:Mohamad Soueidan、Jacqueline Collin、Richard Gil
DOI:10.1016/j.tetlet.2006.05.169
日期:2006.7
Samariumdiiodide is an efficient precatalyst for the Friedel–Crafts reaction involving various aromatic substrates and chelating electrophiles. Alkyl 3,3,3-trifluoropyruvates are transformed into α-hydroxyesters in good yields with total regioselectivity. In reactions involving an ethyl glyoxylate or a glyoxylic imine, α-hydroxyesters or α-aminoesters are obtained with variable amounts of products
Synthesis of α-(3-Indolyl)glycine Derivatives via Spontaneous Friedel-Crafts Reaction between Indoles and Glyoxylate Imines
作者:Biao Jiang、Zuo-Gang Huang
DOI:10.1055/s-2005-869978
日期:——
Mannich-type Friedel-Crafts reaction between indoles and ethyl glyoxylate imines proceeded spontaneously in the absence of an acid catalyst. Ethyl alpha-(3-indolyl)glycinates were obtained in moderate to high yields. Reaction with (R)-alpha-methylbenzylamine derived imine afforded chiral alpha-(3-indolyl)glycinates with good diastereoselectivities (up to 96:4).
Merging visible-light photoredox and Lewis acid catalysis for the functionalization and arylation of glycine derivatives and peptides
作者:Shaoqun Zhu、Magnus Rueping
DOI:10.1039/c2cc36995h
日期:——
A relay catalysis protocol for the functionalization of α-amino acids and dipeptides using a combination of visible-light photoredox and Lewis acid catalysis has been developed.
Co-Catalyzed C(sp<sup>3</sup>)–H Oxidative Coupling of Glycine and Peptide Derivatives
作者:Marcos San Segundo、Itziar Guerrero、Arkaitz Correa
DOI:10.1021/acs.orglett.7b02567
日期:2017.10.6
peptide derivatives are described. These cross-dehydrogenativereactions occur under mild conditions and allow for the rapid assembly of structurally diverse α-amino carbonyl compounds. Unlike enolate chemistry, these methods are distinguished by their site-specificity, occur without racemization of the existing chiral centers, and exhibit total selectivity for aryl glycine motifs over other amino acid