Reductive deoxygenation of ortho-hydroxyaromatic aldehydes to 1,2-bis(hydroxyaryl)ethanes: application to the synthesis of ethylene bridged calixarene-analogous metacyclophanes
作者:Suchitra Bhatt、Sandip K. Nayak
DOI:10.1016/j.tetlet.2009.07.156
日期:2009.10
and convenient protocol for the synthesis of hexahydroxy[2.1.2.1.2.1]- and octahydroxy[2.1.2.1.2.1.2.1]metacyclophanes from 4-substituted phenol in four steps has been developed. The synthetic route involved the preparation of the key intermediate 1,2-bis(5-substituted-2-hydroxyphenyl)ethanes in good yields via (i) formylation of 4-substituted phenol, (ii) reductive deoxygenation of 5-substituted 2-hydroxy
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.