A palladium-catalyzed dialkylation of 1,3-dien-5-ynes was developed using alkenyl double bonds as the initiator and terminator for the synthesis of functionalized indene derivatives. The reactions were performed undermild reaction conditions, affording the corresponding multi-substituted indene derivatives in high efficiency via unprecedented 5-endo cyclization and alkylation processes. It was found
Chemo‐ and Regioselective Catalyst‐Controlled Carbocyclization of Alkynyl Ketones: Rapid Synthesis of 1‐Indanones and 1‐Naphthols
作者:Liangliang Song、Guilong Tian、Erik V. Van der Eycken
DOI:10.1002/chem.201901860
日期:2019.6.7
A catalyst‐controlled intramolecular carbocyclization of 2‐alkynyl aryl ketones is presented. Under rhodium(III) catalysis, 1‐indanones are formed through 5‐exo‐dig carbocyclizations with exclusive chemo‐, regio‐ and stereoselectivity. When catalyzed by copper(I), 1‐naphthols are obtained through 6‐endo‐dig carbocyclizations with exclusive chemo‐ and regioselectivity.
Synthesis of Naphthalene Derivatives from<i>ortho</i>-Alkynylacetophenone Derivatives via Tandem<i>in Situ</i>Incorporation of Acetal and Intramolecular Heteroalkyne Metathesis/Annulation
作者:Seetharaman Manojveer、Rengarajan Balamurugan
DOI:10.1021/ol5003835
日期:2014.3.21
An interesting domino reaction for the synthesis of substituted naphthyl ketones has been developed using readily accessible starting materials. This domino reaction proceeds via in situ incorporation of an acetal followed by intramolecular heteroalkyne metathesis/annulation in an ortho-alkynylacetophenone derivative. A deuterium incorporation experiment has been carried out to understand the mechanism