Photochemical Transformations of Some 2-（5-Methylthiophen-2-yl）-3-[（naphthalen-2-yl）methoxy]-4H-chromen-4-ones Involving Type-II Process  

作　　者：Kamboj, Ramesh C Kumar, Dinesh Sharma, Geeta Arora, Rita 

机构地区：[1]Department of Chemistry, Kurukshetra University, Kurukshetra 136119, India

出　　处：《Chinese Journal of Chemistry》2011年第4期745-750,共6页中国化学（英文版）

摘　　要：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.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.

关 键 词：type-II reaction RADICALS thienylchromone sigmatropic rearrangement substituent effects 

分 类 号：O625.322[理学—有机化学] TK51[理学—化学]