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was then mixed with ethyl acetate and passed through a celite
pad. This organic layer was then washed with water (3 ꢁ 5 mL),
dried over anhydrous Na2SO4 and concentrated under reduced
pressure. The crude product was then puried by silica gel
column chromatography eluting with (97 : 3: petroleum ether–
ethyl acetate) to give pure product (1a) in 84% yield.
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Acknowledgements
B. K. P acknowledges the support of this research by the
Department of Science and Technology (DST) (SR/S1/OC-79/
2009), New Delhi, and the Council of Scientic and Industrial
Research (CSIR) (02(0096)/12/EMR-II). NK thanks CSIR for
fellowship. Thanks are due to Central Instruments Facility (CIF)
IIT Guwahati for NMR spectra and DST-FIST for XRD facility.
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4084 | RSC Adv., 2014, 4, 4080–4084
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