1959
DOI: 10.1002/hlca.19590420119
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Hydroxy‐morphinane. 12. Mitteilung. Die Konfiguration der Morphinane

Abstract: 212 HELVETICA CHIMICA ACTA Riickfluss gekocht. Nun wurde im Eisbad abgekiihlt, die ausgefallene Phtalsaure abgenutscht, zweimal mit je 40 ml Wasser nachgewaschen untl das Filtrat unter Wasserstrahlvakuum zur Trockne eingedampft. Der Ruckstand wurde in 100 ml Wasser suspendiert, von nicht gelostem Natriumchlorid und einer Spur Phtalsanre abgenutscht, mit etwas Wasser nachgewaschen und das Filtrat unter Wasserstrahlvakuum wieder zur Trockne eingedampft. Das gebildete 1,-Threonin-hydrochlorid wurde mit 200 ml Met… Show more

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Cited by 18 publications
(4 citation statements)
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“…Pressure was released with caution. Solvent was removed under reduced pressure to afford crude 6 (2.5 g, 99%) (lit . mp 109−111 °C).…”
Section: Methodsmentioning
confidence: 99%
See 1 more Smart Citation
“…Pressure was released with caution. Solvent was removed under reduced pressure to afford crude 6 (2.5 g, 99%) (lit . mp 109−111 °C).…”
Section: Methodsmentioning
confidence: 99%
“…Solvent was removed under reduced pressure to afford crude 6 (2.5 g, 99%) (lit. 35 (-)-3-Methoxymorphinan (7). The N-dealkylation was carried out by the procedure of Olfoson et al 36 A mixture of 6 (5.2 g, 19.2 mmol), R-chloroethyl chloroformate (18 mL, 166 mmol), 1,2-dichloroethane (80 mL), and NaHCO3 (2.4 g) was allowed to reflux for 48 h. Upon filtration, the filtrate was concentrated to dryness under reduced pressure.…”
Section: Methodsmentioning
confidence: 99%
“…The quaternary salt was also obtained which is disadvantageous because it can be easily transformed into a rearranged product. 18 In the presence of sodium hydride 19 in tetrahydrofuran the conversion of the methylation was more than 95%. The most common reagents for O-demethylation are boron tribromide or hydrogen bromide.…”
Section: Resultsmentioning
confidence: 99%
“…The identity of C-11 and C-14 centers has already been determined from previously established relative configurations (vide supra), as has the absolute configuration of 337. 146 The absolute configuration of a-336 (-) is thus 2R:6R: 11R. The absolute configurations for all the isomers of metazocine ( 336 Although the ß Isomers are generally more active analgetics or analgetic-antagonists than their a counterparts, the configuration at C-11 is not the predominant determinant of such activity since the -(-) and ß-(-) isomers of a variety of N-substituted benzomorphans are markedly more active than the (+) enantiomers.…”
Section: B Nmr Studiesmentioning
confidence: 99%