The following were allowed to react with chlorosulfonic acid, and the resulting sulfonyl chlorides converted to the corresponding sulfonamides: 2, 3-dichloro-, 2, 5-dichloro-, 3, 4- dichloro-and 3, 5-dichloroaniline. Except for 2, 5-dichloroaniline, which did not sulfonate in the position ortho to the amino group, the sulfonamides were cyclized with formic acid, and also with formaldehyde, to obtain substituted 1, 2, 4-benzothiadiazine 1, l-dioxides. ...
