Conversion of substituted benzyl ethers to diarylmethanes. A direct synthesis of diarylbenzofurans
摘要:
The Lewis acid catalyzed rearrangement of substituted benzyl ethers affords diarylmethanes in good yields. One of the products was converted into a diarylbenzofuran using a benzoylation/P4-tBu cyclization protocol. (C) 2012 Elsevier Ltd. All rights reserved.
Friedel-Crafts alkylation oxidative cyclization catalyzed by co-oxidation of SeO<sub>2</sub> and FeCl<sub>3</sub>: a simple synthesis of benzo[<i>b</i>]furan from acetophenone and anisole
Abstract A simple one-pot method was developed to complete the α-diphenyl substitution and cyclization of acetophenone using acetophenone and substituted benzene as substrates, and a series of benzofuran derivatives was synthesized efficiently. It had the advantages of medium to excellent yield and easily obtained substrate. Compared with other methods, the method avoids the use of precious metals
872. Polymerisation of flavans. Part II. The condensation of 4′-methoxyflavan with phenols
作者:B. R. Brown、W. Cummings
DOI:10.1039/jr9580004302
日期:——
Ga(OTf)3-mediated synthesis of substituted benzofurans
作者:Heui-Sin Wang、Chieh-Kai Chan、Meng-Yang Chang
DOI:10.1016/j.tet.2016.07.007
日期:2016.8
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.
Conversion of substituted benzyl ethers to diarylmethanes. A direct synthesis of diarylbenzofurans
作者:George A. Kraus、Divya Chaudhary
DOI:10.1016/j.tetlet.2012.10.058
日期:2012.12
The Lewis acid catalyzed rearrangement of substituted benzyl ethers affords diarylmethanes in good yields. One of the products was converted into a diarylbenzofuran using a benzoylation/P4-tBu cyclization protocol. (C) 2012 Elsevier Ltd. All rights reserved.