Utilization of Fatty acid in heterocyclic synthesis. Part XIII:2-Chloro-5-heptadecyl [1,3,4]thiadiazole as a building block for synthesis of S-triazolo[2,4-b]thiadiazole, benzimidiazo[2,1-b]thiadiazole, thiadiazolo[2,3-b]quinazolin-5-one as well as thiadiazole-2-yl(piperidine, pyridiazine and/or phthalazine) Published in OLAJ, SZAPPAN, KOZMETIKA (2011) 60 (3), 51-57.