The regiospecific synthesis of 5- and 7-monosubstituted and 5,6-disubstituted 2-arylbenzothiazoles
作者:Ian Hutchinson、Malcolm F.G Stevens、Andrew D Westwell
DOI:10.1016/s0040-4039(99)02076-6
日期:2000.1
regiospecific synthesis of a range of antitumour 2-arylbenzothiazoles substituted in the benzothiazole ring is described. In this procedure a bromine atom situated ortho to the anilido nitrogen is used to direct a regiospecific cyclisation where, in the absence of bromine, a mixture of regioisomers is produced. The chemistry described is applicable to the synthesis of 2-arylbenzothiazoles bearing both electron-withdrawing
描述了在苯并噻唑环中取代的一系列抗肿瘤2-芳基苯并噻唑的区域特异性合成。在该方法中,位于苯胺氮氮邻位的溴原子用于指导区域特异性环化,在不存在溴的情况下,会生成区域异构体的混合物。所描述的化学方法适用于合成在芳基环上带有吸电子(-NO 2)和给电子(-NH 2)取代基的2-芳基苯并噻唑。