Anionic [4+2]cycloaddition - Retro [4+2]cycloaddition strategy in the synthesis of psoralen and its isoster

被引:0
作者
Bandyopadhyay, M [1 ]
Datta, K [1 ]
Mal, D [1 ]
机构
[1] Indian Inst Technol, Dept Chem, Kharagpur 721302, W Bengal, India
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中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Furan-1,4-dipolar agents 7 and 16e, prepared in few steps from commercially available furoates, have been annulated with bicyclopentadienone 2 to provide pentacyclic frameworks 8 and 17 respectively. Subsequent transformations of 8 and 17 through retro-Diels-Alder reaction and indenol-indanone rearrangement have furnished psoralen precursors 14 and 19. Similarly, oxaindacenone 23 has been prepared in good yield from 21.
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页码:551 / 556
页数:6
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