14770-73-1Relevant academic research and scientific papers
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.
