期刊
TURKISH JOURNAL OF CHEMISTRY
卷 39, 期 2, 页码 412-425出版社
SCIENTIFIC TECHNICAL RESEARCH COUNCIL TURKEY-TUBITAK
DOI: 10.3906/kim-1410-41
关键词
Chromone-3-carboxylic acid; benzoxocinone; pyranochromenes; ring expansion; carbon nucleophiles
Unexpected routes to synthesize functionalized benzoxocinones and heteroannulated pyranochromenes were achieved via transformations of the 7-pyrone ring in chromone-3-carboxylic acid throughout its reactions with some acyclic and cyclic carbon nucleophiles. A key part of the reaction mechanisms is discussed. Structures of the new synthesized products were established on the basis of elemental analysis and spectral data (IR, MS, and (II)-I-1 and C-13 NMR).
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