Encyclopedia of the Alkaloids

Volume 4 of the Encyclopedia of the Alkaloids covers the literature to the end of 1981 and includes those compounds which have been discovered since Volume 3 was published in 1977. There is also a small number of entries giving recently determined structure or addi- tional information regarding alkaloids given in the preceding three volumes. It is a great pleasure to thank the staff of the John Rylands Science Library of the Univer- sity of Manchester for kindly providing me with access to the literature on this subject. Woodhouses, JOHN S. GLASBY Manchester, England May, 1982 Contents A ...I N ...251 B ...72 0 ...262 C ...79 P ...273 0 ...108 Q ...299 E ...141 R ...300 F ...152 S ...31O G ...158 T ...339 H ...167 U ...358 I ...192 V ...361 J ...207 W ...367 K ...210 X ...368 L ...217 Y ...369 M ...227 Z ...370 Formula Index...371 A ACETYLALLOYOHIMBINE (Alkaloid NRB6) C23H2SN203 M. p. Indefinite I I OAc The root bark of Rauwolfia nitida yields this yohimbine-type alkaloid which has been ob- tained as an off-white amorphous powder having no definite melting point. The base is lae- 2 vorotatory with a specific rotation of [aJ5 -89 (c 0.
01, CHCI ) and gives an ultraviolet 3 spectrum in MeOH with absorption maxima at 225,284 and 290 nm. The structure has been established from chemical and spectroscopic analysis. M. A. Amer, W. E. Court, Phytochem. , 20,2569 (1981) 14-ACETYLBROWNINE ___ :(OMe M. p.