Encyclopedia of the Alkaloids: Volume 4 by John Glasby

By John Glasby

Volume four of the Encyclopedia of the Alkaloids covers the literature to the tip of 1981 and comprises these compounds which were found considering that quantity three was once released in 1977. there's additionally a small variety of entries giving lately decided constitution or addi­ tional information about alkaloids given within the previous 3 volumes. it's a nice excitement to thank the employees of the loo Rylands technological know-how Library of the Univer­ sity of Manchester for kindly offering me with entry to the literature in this topic. Woodhouses, JOHN S. GLASBY Manchester, England may well, 1982 Contents A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I N . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 251 B . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . seventy two zero . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 262 C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . seventy nine P . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 273 zero . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108 Q . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 299 E . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 141 R . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . three hundred F . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 152 S . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31O G . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 158 T . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 339 H . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 167 U . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 358 I . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 192 V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 361 J . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 207 W . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 367 okay . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 210 X . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 368 L . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 217 Y . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 369 M . . . . . . . . . . . . . . . . . . . . . . . . . . . . 227 Z . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 370 formulation Index. . . . . . . . . . . . . . . . . . . . 371 A ACETYLALLOYOHIMBINE (Alkaloid NRB6) C23H2SN203 M. p. Indefinite I I OAc the foundation bark of Rauwolfia nitida yields this yohimbine-type alkaloid which has been ob­ tained as an off-white amorphous powder having no certain melting aspect. the bottom is lae­ 2 vorotatory with a selected rotation of [aJ5 -89° (c zero. 01, CHCI ) and offers an ultraviolet three spectrum in MeOH with absorption maxima at 225,284 and 290 nm. The constitution has been tested from chemical and spectroscopic research. M. A. Amer, W. E. courtroom, Phytochem. , 20,2569 (1981) 14-ACETYLBROWNINE ___ :(OMe M. p.

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Example text

228-230°C A further alkaloid isolated from Rauwolfia oreogiton, this base has the above structure which has been established from chemical analysis and spectroscopic data. It gives colourless needles from Me2CO and is dextrorotatory with a specific rotation of [aJJI +99° (MeOH). B. A. Akinloye, W. E. p. Indefinite Rauwolfia oreogiton also yields this alkaloid which has been obtained as a white powder having no definite melting point. 7° (MeOH) and has been assigned the above structure on the basis of chemical and spectroscopic analysis.

The structure has been established from chemical correlations and spectroscopic examination. M. p. 159-160°C OMe 25 A further dimeric alkaloid obtained from Cinchona ledgerica, this base has the above structure determined from chemical and spectroscopic analysis. It forms colourless rods when crystallized from EtOH. M. p. Not given OMe A minor constituent of the extract of Cinchona ledgerica, this base has been assigned the above dimeric structure on the basis of chemical analysis and the infrared, NMR and mass spectra.

The structure has been elucidated from chemical degradations and spectroscopic analysis. 0 L. , Bull. Soc. Chim. p. , this base occurs in the leaves and root of the plant. It is an amorphous powder having no definite melting point. 0, MeOH), and the structure has been established from chemical correlations and the infrared, ultraviolet, NMR and mass spectra. A. , 1. Pharm. p. Indefinite This indolizidinocarbazole alkaloid occurs in the ethanolic extract of Capuronetta elegans. 73, CHCI 3 ). The structure has been determined from chemical and spectroscopic analysis.

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