Title: CHIRAL IMIDAZO[2,1-b][1,3,4]THIADIAZOLE COMPOUNDS AND PROCESSES FOR SYNTHESIZING THE SAME Abstract The present invention relates to a compound represented by Formula I or pharmaceutically acceptable salt, Formula I wherein, R1 , R2 , R3 and R4 have the meaning as described herein. The present invention also relates to processes for preparing the compound of formula I. N S N R 2 N R 1 R 3 R 4