**2. Material and methods**

Chemicals used for the synthesis were of AR grade of Merck, S.D. Fine and Aldrich. The reactions were examined by E. Merck TLC aluminum sheet silica

gel60F254 and visualizing the spot in UV Cabinet and iodine chamber. The melting points were note down in open capillary in paraffin bath and are uncorrected. <sup>1</sup> H NMR spectra are logged on a Bruker AM 400 instrument (400 MHz) using tetramethylsilane (TMS) as an internal reference and DMSO-d6 as solvent. Chemical Shifts are specified in parts per million (ppm). Positive-ion Electro Spray Ionization (ESI) mass spectra were acquired with a Waters Micromass Q–TOF Micro, Mass Spectrophotometer. IR spectra were recorded on a Shimadzu IR Spectrophotometer (KBr, υmax in cm<sup>1</sup> ). The compounds are purified by using column chromatography on silica gel (60–120 mesh). Elemental (CHN) examination was done using Thermo Scientific (Flash-2000), the compounds were investigated for carbon, hydrogen and nitrogen and the results found are in good agreement with the calculated values.
