34855-66-8Relevant academic research and scientific papers
Use of dicobalt hexacarbonyl-estabilized propargyl cations in intramolecular Friedel-Crafts alkylations
Grove, David D.,Miskevich, Frank,Smith, Chase C.,Corte, James R.
, p. 6277 - 6280 (1990)
Cis-9a-ethynyl-1,2,3,4,4a,9a-hexahydro-9H-fluorenes and the corresponding dibenzofurans have been prepared by a stereoconvergent, intramolecular Friedel-Crafts alkylation involving dicobalt hexacarbonylstabilized carbocations.
Ga(OTf)3-mediated synthesis of substituted benzofurans
Wang, Heui-Sin,Chan, Chieh-Kai,Chang, Meng-Yang
, p. 5132 - 5141 (2016/07/25)
A synthetic procedure, for the synthesis of a series of functionalized benzofurans 3–5 and benzonaphthofurans 6, starting from intermolecular O-alkylation of α-bromoaryl ketones 2 with potassium oxygenated phenoxides 1 followed by Ga(OTf)3-catalyzed direct intramolecular cyclodehydration of the resulting α-aryloxyaryl ketones, has been developed. The use of various metal triflates was investigated for a facile approach and efficient transformation. Pentacyclic benzophenanthrofurans 7 were prepared via photolytic annulations of 5.
