Synthesis of New Methoxyquinopimaric-Acid Scaffold Derivatives
- 31 Downloads
New 2- and 3-methoxyquinopimaric-acid derivatives were synthesized by a Diels–Alder reaction of levopimaric acid and 2-methoxy-1,4-benzoquinone. The reaction rate and regioselectivity of the cycloaddition were increased significantly by using a Bmim·BF4 catalyst. Photolysis of 3-methoxyquinopimaric acid produced new scaffold derivatives. The compounds were characterized by NMR spectroscopy and elemental analysis.
Keywordsdiene synthesis methoxyquinopimaric acid photocyclization
- 1.G. A. Tolstikov, T. G. Tolstikova, E. E. Shults, S. E. Tolstikov, and M. V. Khvostov, Resin Acids of Russian Conifers. Chemistry and Pharmacology [in Russian], Geo, Novosibirsk, 2011, 395 pp.Google Scholar
- 7.R. V. Kuzmich, G. F. Vafina, F. Z. Galin, and M. S. Yunusov, Vestn. Bashk. Gos. Univ., 4, 1140 (2011).Google Scholar
- 8.I. S. Ioffe and A. F. Sukhina, Zh. Obshch. Khim., 23, 295 (1953).Google Scholar