New Syntheses of the C,D-Ring Pyrromethenones of Phytochrome and Phycocyanin
β Scribed by Jacobi, Peter A.; DeSimone, Robert W.; Ghosh, Indranath; Guo, Jiasheng; Leung, Sam H.; Pippin, Douglas
- Book ID
- 120705529
- Publisher
- American Chemical Society
- Year
- 2000
- Tongue
- English
- Weight
- 169 KB
- Volume
- 65
- Category
- Article
- ISSN
- 0022-3263
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π SIMILAR VOLUMES
despite their lower molecular weights, the carbon compounds (2u)-(2c) are less volatile and higher melting than the corresponding silicon analogues. arithmetic mean 5 of the two coupling constants is almost exactly equal to the values found for the isosters: hexamethyldisiloxane: I 18.0;
Total syntheses of (-)-plectrodorine [(-)-1] and (+)-oxerine [(+)-3] possessing the cyclopenta[c]pyridine ring system have been accomplished through a route starting from the chiral g-butyrolactone 7 and exploiting the intramolecular oxazole-olefin Diels-Alder reaction. The sign of specific rotation
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