which is confirmed by single crystal x-ray. The compound 7 on reacts with one equivalent of alcohols to get corresponding mono esters 8. In Separate experiment, the diacid 1a reacts with 3azido-1-propanol in presence of EDC give the diazide product 3a in 4% whereas in newly ). The progress of reaction was monitored by TLC (usually 5-6h). After completion of reaction, the reaction mixture was diluted with water (150 mL) and extracted with dichloromethane (75 mL X 2). The combined organic layers were washed with saturated solution of sodium bicarbonate (100 mL), brine solution (100 mL), dried over anhydrous magnesium sulfate and filtered. Evaporation of the solvent followed by purification of the residue on silica gel column chromatography using a combination of ethyl acetate and hexane as eluent furnished pure ester compound, which were identified by (TLC, IR and NMR spectrum) and known samples with authentic compounds.