Hydroxy-steroids. Part IV. The preparation and spectra of steroid olefins
作者:G. M. L. Cragg、C. W. Davey、D. N. Hall、G. D. Meakins、E. E. Richards、T. L. Whateley
DOI:10.1039/j39660001266
日期:——
Convenient preparations have been developed for a series of steroidal mono-olefins free from oxygenated substituents: this Series includes representatives of all but one of the possible endocyclic olefins. The infrared, nuclear magnetic resonance, and ultraviolet spectra of the compounds were examined with particular attention to the relative power and scope of the different techniques in structural
Hydroxy-steroids. Part XI. The preparation and infrared spectra of vicinal cholestanediols
作者:C. W. Davey、E. L. McGinnis、J. M. McKeown (née Chancellor)、G. D. Meakins、M. W. Pemberton、R. N. Young
DOI:10.1039/j39680002674
日期:——
Twenty-eight vicinal cholestanediols (positions 1,2; 2,3; 3,4; 4,5; 5,6; 6,7; and 7,8) have been prepared by unambiguous routes starting from the corresponding olefins. The O–H stretching bands of dilute solutions of these diols and of seven reference compounds have been examined under high dispersion. Characteristic differences between ax,ax, ax,eq, and eq,eq compounds were observed. It was concluded
�ber die Reduktion von ?, ?-unges�ttigten Carbonylverbindungen nachWolff-Kishner. 3. Mitteilung
作者:R. Fischer、G. Lardelli、O. Jeger
DOI:10.1002/hlca.19510340540
日期:——
Doppelbindung der α,β-ungesättigten Carbonyl-Gruppe bei der Reduktion nach Wolff-Kishner beschrieben. So lieferte das Citral (I) das Δ2,7-2,6-Dimethyl-octadien (II), das Myrtenal (III) das β-Pinen (IV), das Δ5-Cholesten-7-on (VI) das unbekannte Δ6-Cholesten (VII) und das zweifach ungesättigte β-Jonon den Kohlenwasserstoff 4-[2′,6′,6′-Trimethyl-cyclohexen-(1′)-yl]-buten - (2) (XV). Die Reduktion von Cyclohexyliden-acetaldehyd
ES wurden weitere Beispiele DER Verschiebung DER Doppelbindung DERα,β-ungesättigten羰基- GRUPPE贝DER Reduktion NACH沃尔夫- Kishner beschrieben。所以lieferte DAS柠檬醛(I)DASΔ 2,7- -2,6-二甲基-辛二烯(II),DAS Myrtenal(III)DASβ-Pinen(IV),DASΔ 5 -Cholesten -7-酮(VI)DAS unbekannteΔ 6 -Cholesten(VII)UND DAS zweifachungesättigteβ-Jonon巢穴Kohlenwasserstoff 4- [2',6',6'-三甲基环己烯(1') -基] -丁烯- (2)(XV)。环己酮-缩醛缩醛还原剂(GIIIsch der Kohle
Steroidal sulphur compounds. Part III. Configuration, conformation, and chiroptic properties of steroidal methyl sulphoxides
作者:D. Neville Jones、M. J. Green、R. D. Whitehouse
DOI:10.1039/j39690001166
日期:——
preferred conformations were revealed by n.m.r. spectroscopy. The optical rotatory dispersions of the sulphoxides are consistent with the asymmetric perturbation of the sulphinyl chromophores by the steroid nucleus, a consequence of restricted rotation about a C–S bond. The ratio of axial to equatorial sulphoxides obtained by base-catalysed equilibration at C-7 depends upon chirality at sulphur.