Synthesis of homologs of theophylline an
โ
รฉ. I. Ivanov; I. M. Yaroshchenko; G. D. Kalayanov
๐
Article
๐
1989
๐
Springer US
๐
English
โ 67 KB
Previously we reported the synthesis of caffeine homolog Va from caffeidine [i, 2]. Later this scheme was used by Japanese [3] and American [4] workers to obtain 6-substituted derivatives of the type Va (R a ~ H) and theophylline homolog Vb. We showed that homologs of theophylline Vb and theobromin