The preparation of a series of sterically constrained phenyleneethynylenes is described. Restricting the interannular rotation significantly narrows the lowest energy absorption and increases its extinction coefficient in the UV/VIS spectrum. (C) 1997 Elsevier Science Ltd.
The preparation of a series of sterically constrained phenyleneethynylenes is described. Restricting the interannular rotation significantly narrows the lowest energy absorption and increases its extinction coefficient in the UV/VIS spectrum. (C) 1997 Elsevier Science Ltd.
Efficient One-Pot Synthesis of 2-Arylbenzo[<i>b</i>]furans from 2-Styrylphenols Using CuBr<sub>2</sub>
作者:Suchitra Bhatt、Kshama Roy、Sandip K. Nayak
DOI:10.1080/00397910903318716
日期:2010.8.16
A newroute to the synthesis of 2-arylbenzo[b]furans has been developed. It involves homo/cross-McMurry coupling of salicylaldehyde/substituted salicylaldehydes/aromatic aldehydes to 2-styrylphenols, which undergo intramolecular cyclization with CuBr2 in tetrahydrofuran at ambient temperature to afford 2-arylbenzo[b]furans in good yields.