Pd-free Sonogashira coupling: one pot synthesis of phthalide via domino Sonogashira coupling and 5-exo-dig cyclization

Phthalides have been synthesized exclusively in one pot via Pd-free Sonogashira coupling. A Cu-catalyzed domino Sonogashira coupling and 5- exo-dig cyclization between suitable substituted ortho -bromobenzoic acids and terminal alkynes afforded phthalides in good yields under mild reaction condition...

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Published in:RSC advances 2014, Vol.4 (80), p.42604-42607
Main Authors: Dhara, Shubhendu, Singha, Raju, Ghosh, Munmun, Ahmed, Atiur, Nuree, Yasin, Das, Anuvab, Ray, Jayanta K.
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description Phthalides have been synthesized exclusively in one pot via Pd-free Sonogashira coupling. A Cu-catalyzed domino Sonogashira coupling and 5- exo-dig cyclization between suitable substituted ortho -bromobenzoic acids and terminal alkynes afforded phthalides in good yields under mild reaction conditions.
doi_str_mv 10.1039/C4RA07639G
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title Pd-free Sonogashira coupling: one pot synthesis of phthalide via domino Sonogashira coupling and 5-exo-dig cyclization
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