Tetrahedron Letters p. 255 - 258 (1986)
Update date:2022-09-26
Topics:
Aldersley, Michael F.
Dean, Francis M.
Hamzah, Ahad S.
Appropriate N-ylides convert 2-methyl-1,4-naphthoquinone into 3-(acylmethyl) derivatives which can be cyclised to naphtho<2,3-c>pyran-5,10-diones by treatment with bromine and dehydrobromination with triethylamine; these diones give a variety of striking colours in acid media.
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(1986)
