Уважаемые, коллеги!!! Помогите, пожалуйста, со следующими статьями:
1. Gerrit J. Koomen and Upendra K. Pandit. Unconventional nucleotide analogues. Part IX. N-substituted 3-( pyrimidin-1-yl)pyrrolidin-2-ones // J. Chem. Soc., Perkin Trans. 1, 1973, 1929 - 1933
2. Gerrit J. Koomen, Abraham P. Kroon, Franciso R. Mas Cabré, Alfred P. Goores, Rob Peereboom and Upendra K. Pandit. Unconventional nucleotide analogues. Part X. Synthesis of N-substituted 3-(adenin-9-yl)pyrrolidin-2-ones // J. Chem. Soc., Perkin Trans. 1, 1973, 1934.
3. Robert Clinging, Francis M. Dean and Leonard E. Houghton. Ring expansion of 3-acetylcoumarin by diazoethane: lactones derived from oxepin, oxocin, and oxonin // J. Chem. Soc., Perkin Trans. 1, 1974, 66
4. Frans M. Kaspersen and Upendra K. Pandit. Unconventional nucleotide analogues. Part XIII. (2S,4S)-2-hydroxymethyl- and 2-carboxy-4-(purin-9-yl)pyrrolidines // J. Chem. Soc., Perkin Trans. 1, 1975, 1617
5. Frans M. Kaspersen and Upendra K. Pandit. Unconventional nucleotide analogues. Part XIV. (2S,4S)-2-Hydroxy-methyl- and 2-carboxy-4-(pyrimidin-1-yl)pyrrolidines // J. Chem. Soc., Perkin Trans. 1, 1975, 1798
6. Harjit Singh and Paramjit Singh. Synthesis of heterocyclic compounds via enamines. Part 8. Acid-catalysed transformations in 4,4,6-trimethyl-1,4-dihydropyrimidine-2(3H)-thione derivatives and related compounds // J. Chem. Soc., Perkin Trans. 1, 1980, 1013
Заранее спасибо!!!
