## Abstract The synthesis of substituted 1‐[ω‐(nitrophenyl)alkyl]‐l,2,3,4‐tetrahydro‐iso‐quinolines and their resolution into optical antipodes are described. Some of these l‐[ω‐(nitrophenyl)alkyl]‐l,2,3,4‐tetrahydro‐isoquinolines are potent analgesics.
Synthesen in der isochinolinreihe Zum HOFMANN'schen Abbau 1-Phenäthylsubstituierter 1,2,3,4-Tetrahydroisochinoline
✍ Scribed by A. Rheiner Jr.; A. Brossi
- Publisher
- John Wiley and Sons
- Year
- 1962
- Tongue
- German
- Weight
- 591 KB
- Volume
- 45
- Category
- Article
- ISSN
- 0018-019X
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✦ Synopsis
Abstract
Hofmann exhaustive methylation of the analgesic 1‐p‐chlorophenethyl‐2‐methyl‐6,7‐dimethoxy‐1,2,3,4‐tetrahydro‐isoquinoline (Versidyne = I) leads to 1‐dimethylamino‐1‐(2′‐vinyl‐4′,5′‐dimethoxy‐phenyl)‐3‐(p‐chloro‐phenyl)‐propane (III), the only product formed. Its structure was proved by degradation of the dextrorotatory 1 S enantiomer of Versidyne (Ia) of known absolute configuration, yielding IIIb, the levorotatory 1 S enantiomer of III. Hydrogenation of IIIb affords (‐) 1 S 1‐dimethylamino‐1‐(2′‐ethyl‐4′,5′‐dimethoxy‐phenyl)‐3‐(p‐chloro‐phenyl)‐propane (IXb) which was also synthesized by an unambiguous route.
📜 SIMILAR VOLUMES
Mit Leucinaminopeptidase wurde das Heptapeptid vollstandig zu den Aminosauren abgebaut. Die quantitative Aminosaurebestimmung nach der Methode von MOORE & STEIN (Totalhydrolyse mit HCl) ergab folgende Aminosaurezusammensetzung 16) : Met1 ; Glul ; His1; Phel ; Arg'; Glyl; NH,1J (Tryptophan wurde durc
(−)‐1‐(p‐Chlorostyryl‐2‐acetyl‐6,7‐dimethoxy‐1, 2,3,4‐tetrahydro‐isoquinoline (IX), which has the same configuration as the analgetic substance (−)‐Ro 4‐1778/1 (I), has been correlated with (+)‐calycotomine (V) of known absolute configuration. Thus the absolute configuration of (−)‐I as (R)‐l‐(p‐chl
kIEL\'E'I'ICA CHIMICA ACTA dentlich beschriebenen substituierten Benzaldehyd I [5] [6] 2, leicht zuganglich3). Wir zogen deshalb zur Darstellung yon XI aus I1 die folgenden, im Formelschema 1 wiedergegebenen Reaktionsfolgen in Betracht : Cyclisierung des N-Formylderivates 111, Quartamisierung des er