作者:N. T. Pokhodylo、V. S. Matiychuk、M. D. Obushak
DOI:10.1007/s10593-010-0484-3
日期:2010.6
6-dibromo-2-benzofuran-1(3H)-ones were prepared by the bromination of 6-chloro- and 6-bromo-2-benzofuran-1(3H)-ones and were converted by hydrolysis into 5-chloro- or 5-bromo-2-formylbenzoic acids. The condensation of these acids with rhodanine followed by recyclization gave 7-chloro- and 7-bromo-1-oxo-1H-isothiochromene-3-carboxylic acids.
开发了一种从2-苯并呋喃-1(3H)-一(邻苯二甲酸酯)合成1-氧代-1H-异硫代色酮的方法。通过溴化6-氯和6-溴-2-苯并呋喃-1(3H)-酮来制备3-溴-6-氯-和3,6-二溴-2-苯并呋喃-1(3H)-酮。并通过水解转化成5-氯-或5-溴-2-甲酰基苯甲酸。这些酸与若丹宁的缩合,然后进行环化,得到7-氯-和7-溴-1-氧代-1H-异硫代色烯-3-羧酸。