Synthesis of Coleon U

References

• Matsumoto , T. and Takeda , S. 1979 . Chemistry Letters , : 409
   Google Scholar
• Miyase , T. , Rüedi , P. and Eugster , C. H. 1977 . Helv. Chim. Acta , 60 : 2770
   Google Scholar
• Andersen , A. , Néron-Desbiens , M. and Burnell , R. H. 1980 . Synth. Comm. , 10 : 183
   Web of Science ®Google Scholar
• Rüedi , P. and Eugster , C. H. 1971 . Helv. Chim. Acta , 54 : 1606
   Google Scholar
• Burnell , R. H. , Mo , L. and Moinas , M. 1972 . Phytochemistry , 11 : 2815
   Google Scholar
• Cambie , R. C. , Denny , W. A. , Klose , T. R. and Mander , L. N. 1971 . Aust. J. Chem. , 24 : 99
   Google Scholar
• Mori , K. and Matsui , M. 1970 . Tetrahedron , 26 : 3467
   PubMed Web of Science ®Google Scholar
• The mass spectrum of this product always showed the molecular ion of 9 and that of the more volatile corresponding methoxy quinone (m/e 362) which is produced in the reaction in small quantities. The MeO peak in the nmr spectrum barely managed to exceed the noise
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• The immediate yield was somewhat lower but certain fractions containing only partially methylated material were re-methylated (Me2SO4, K2CO3, acetone)
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