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
A novel and efficient stable radical cation triarylaminiumsalt‐catalyzed aerobic double Friedel–Crafts alkylation reaction of glycine derivatives with indoles has been developed. The reaction was performed in the absence of any other additives under mild conditions and only requires an air atmosphere (or oxygen, 1 atm) as co‐oxidant.
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.
Halogen Bond-Catalyzed Friedel–Crafts Reactions of Aldehydes and Ketones Using a Bidentate Halogen Bond Donor Catalyst: Synthesis of Symmetrical Bis(indolyl)methanes
作者:Xuelei Liu、Shuang Ma、Patrick H. Toy
DOI:10.1021/acs.orglett.9b03578
日期:2019.11.15
The use of a halogen bond donor to catalyze Friedel-Crafts reactions of indoles with a range of aldehydes and ketones to directly produce bis(indolyl)methanes, including the natural products arsindoline A, arundine, trisindoline, and vibrindole A, is reported. The bidentate catalyst used in these reactions proved to be more effective than a monondentate analogue, a thiourea commonly used as an organocatalyst