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Synthetic Communications
An International Journal for Rapid Communication of Synthetic Organic Chemistry
Volume 10, 1980 - Issue 8
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Original Articles

A Novel Synthesis of Berbines- Condensation of 2-(3,4-Dimethoxyphenyl) Ethyl Bromide with 1,4-Dihydro-6,7-Dimethoxy-3 (2H) Isoquinolone-Synthesis of (+)-Xylopinine

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Pages 607-610 | Published online: 05 Dec 2006

References

  • Present paper constitutes part XII of the series ‘Synthesis of heterocycles via lactones’ .
  • Hygiejnisk Institut, Department of Community Health and Environmental Medicine, J. B. Winsl⊘wsvej 19, D.K. 5000, Odense C, Denmark
  • Pandey , G. D. and Tiwari , K. P. 1980 . Synth. Comm. , 10 : 43 G. D. Pandey and K. P. Tiwari, Synth. Comm., 9, 895 (1979)
  • Pandey , G. D. and Tiwari , K. P. 1980 . Heterocycles , 14 : 59 For a recent review on berbine synthesis see
  • Pandey , G. D. and Tiwari , K. P. 1979 . Heterocycles , 12 : 1327 G. D. Pandey and K. P. Tiwari, Indian J. Chem., 18B, 544 (1979); G. D. Pandey and K. P. Tiwari, Indian J. Chem., 18B, 545 (1979)
  • Shamma , M. 1972 . The Isoquinoline Alkaloids , 268 – 317 . New York and London : Academic Press . T. Kametani, ‘The Chemistry of the Isoquinoline Alkaloids’, p. 109 (1968), Hirokawa Publishing Company, Tokyo
  • All m. p. s are uncorrected and were recorded on a ‘Toshniwal’ m. p. apparatus. IR spectra were recorded as a JASCO model IR-S spectrophotometer and NMR spectra on a Thompson-Packard (TPV- 60) or a Wilmad (WCV 60) spectrometer using TMS as an internal standard. Mass spectra were recordedon an Atlas AEI-MS 902 spectrometer at 70eV. All solutions were dried with anhydrous sodium sulphate
  • Sugasawa , S. 1937 . Yakugaku Zasshi , 57 : 296
  • Rosen , G. and Popp , F. D. 1969 . Canad. J. Chem. , 47 : 864
  • Pandey , G. D. and Tiwari , K. P. in press . Indian J. Chem. ,
  • Lenz , G. R. 1974 . J. Org. Chem. , 39 : 2846
  • Kametani , T. Sendai, , Japan : Pharmaceutical Institute, Tohoku University . The sample was kindly provided by Prof

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