A mimher of new bislmzothisaoles h: we hen synthesizrrl 1: y thP polyphosphoric acid-cat, ttlyxcd intermolecular conden. oatjon of dibasic srkls with o-3niinothjoI) lieriol. Uisl~ enzothi~ tzole, l) ie (P-henz~~ thiazol~ l) alkRnefi rontaining lip to ten Inpthylene groups, 1, 2-his (2-l~ enzotliiazol~ l) Pth~ Ieiie, and l,'l-bia (2-l~ ellzothi; l?; ol? ll)-l,~-cth~ n~~ diol have been synthesized ill!, ieItis of 5649% of the theory. 1,'L-Bis ('l-henzothiazol3l) hen~~ e and l, $- ...