Scope of Palladium-Catalyzed Alkylative Ring Opening
作者:Mark Lautens、Sheldon Hiebert
DOI:10.1021/ja037550s
日期:2004.2.1
We have explored the scope of the palladium-catalyzed nucleophilic ringopening methodology. New highly selective and highly active catalysts have been found for the ringopening of oxabenzonorbornadienes. Employing these catalysts, the addition of various alkyl nucleophiles to oxabenzonorbornadiene has been achieved. In addition, reaction of diethylzinc with [3.2.1] oxabicyclic alkenes has been accomplished
Aminomethylation of Oxabenzonorbornadienes via the Merger of Photoredox and Nickel Catalysis
作者:Abdoul G. Diallo、David Roy、Sylvain Gaillard、Mark Lautens、Jean-Luc Renaud
DOI:10.1021/acs.orglett.0c00593
日期:2020.3.20
oxabenzonorbornadienes using dual photoredox/nickelcatalysis has been disclosed. This cascade reaction allowed the preparation of the cis-aminomethyl dihydronaphthalenols without any prefunctionalization or any use of nucleophilic organometallic species. The control of the regio- and stereoselectivity might be explained by a sequence involving insertion of nickel(0) into the C-O bond followed by the formation
ilyl)phenyl]iodonium triflates were prepared for the generation of benzynes bearing ketone function. Treatment of the iodonium triflates with Bu4NF in CH2Cl2 in the presence of furan at room temperature gave 6-acyl-1,4-epoxy-1,4-dihydronaphthalenes in high yields. The mild conditions and the tolerance of the ketone function on benzyne generation are attributable to the advantage of hypervalent iodine