A novel efficient protocol for preparation of 3-formyl-2-arylbenzo[b]furan derivatives
作者:Benren Liao、Libo Ruan、Min Shi、Nian Li、Liang Chang、Leping Liu、Fan Yang、Jie Tang
DOI:10.1016/j.tetlet.2014.04.050
日期:2014.5
An efficient method for preparation of 3-formyl-2-arylbenzo[b]furan derivatives 4 from 3-chloro-2-(2-methoxyaryl)-1-arylprop-2-en-1-one 2 was developed, and the desired product was obtained in good to excellent yields. By converting 2-(2-methoxyphenyl)-3-oxo-3-phenylpropanal 1 to 2, the regioselectivity problem occurring in the reaction when using 1 as the starting material was successfully avoided
用于制备3-甲酰基-2-芳基苯并[的有效方法b ]呋喃衍生物4,由3-氯-2-(2- methoxyaryl)-1- arylprop -2-烯-1-酮2开发,以及所需的获得的产物具有良好至优异的产率。通过将2-(2-甲氧基苯基)-3-氧代-3-苯基丙醛1转化为2,成功地避免了当使用1作为起始原料时在反应中发生的区域选择性问题。此外,尽管形成了中间体3-(二溴甲基)-2-苯基苯并[ b ]呋喃3a,但仍采用了一锅法进行连续的脱甲基,环化和水解反应可能是孤立的。在一些现场调查的基础上,提出了一种可行的机制。