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The synthesis of some pyrano[2,3‐ g ]chromene‐2,7‐diones and furo[2,3‐ g ]chromen‐6‐ones
Author(s) -
Nicolaides D. N.,
Fylaktakidou K. C.,
Litinas K. E.,
Adamopoulos S. G.
Publication year - 1998
Publication title -
journal of heterocyclic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.321
H-Index - 59
eISSN - 1943-5193
pISSN - 0022-152X
DOI - 10.1002/jhet.5570350117
Subject(s) - furocoumarin , chemistry , coumarin , wittig reaction , furocoumarins , stereochemistry , combinatorial chemistry , organic chemistry , dna , biochemistry , photochemistry
The o ‐hydroxyformylcoumarin 5b , easily prepared from compound 1 , is further transformed to the title coumarin derivatives 7, 10, 19a‐c via its initial Wittig olefination with ylides 2b, 8, 18a‐c respectively. Coumarins 16a, b were also formed by treatment of 5b with compounds 15a, b . The preparation of the interesting furocoumarin derivatives 11, 14, 20b, c as well as of compound 13 is also described.