A novel, one-pot, phenylboronic acid catalyzed, cyanide promoted synthesis of 2-(2-hydroxyphenyl)benzoxazoles from salicylaldehydes and o-aminophenols is described. The synthesis is characterized by mild conditions, short reaction times, and simple workup of crystalline, high purity products. (C) 2011 Elsevier Ltd. All rights reserved.
An efficient potassium cyanide-promoted synthesis of 2-arylbenzoxazoles from [4.3.0]boron heterobicycles
The 2-arylbenzoxazoles 3a-f were produced in moderate to excellent yields merely by stirring a potassium cyanide (3 equiv)-containing methanol solution of the borobicyclic compounds 1a-f at room temperature. These compounds were fully characterized spectroscopically [1R, H-1, and C-13 NMR and X-ray analysis (3a)] and by elemental analysis. Crown Copyright (C) 2010 Published by Elsevier Ltd. All rights reserved.
SKOPENKO, V. N.;OLSHEVSKAYA, I. A.;POCHINOK, V. YA.;OLXOVIK, L. A., YKP. XIM. ZH., 1985, 51, N 3, 316-320
作者:SKOPENKO, V. N.、OLSHEVSKAYA, I. A.、POCHINOK, V. YA.、OLXOVIK, L. A.