Photochemical Transformations of Some 2‐(5‐Methylthiophen‐2‐yl)‐3‐[(naphthalen‐2‐yl)methoxy]‐4H‐chromen‐4‐ones Involving Type‐II Process |
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| Authors: | Ramesh C. Kamboj Dinesh Kumar Geeta Sharma Rita Arora |
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| Affiliation: | Department of Chemistry, Kurukshetra University, Kurukshetra 136119, India |
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| Abstract: | Photo‐irradiation of 2‐(5‐methylthiophen‐2‐yl)‐3‐[(naphthalen‐2‐yl)methoxy]‐4H‐chromen‐4‐ones yielded the fascinating angular tetracyclic products via cyclization involving both 2‐thienyl ring and naphthylmethoxy group via 1,4‐biradical generated in the Norrish type‐II process. The stereochemical dispositions of the products were determined by MM2 energy minimized programme and spectroscopic analysis. |
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| Keywords: | type‐II reaction radicals thienylchromone sigmatropic rearrangement substituent effects |
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