1962
DOI: 10.1002/cber.19620951017
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Acyl‐lacton‐Umlagerung, XXII. Umlagerung von α‐Aroyl‐pyrrolidonen in konz. Salzsäure zu Pyrrolinderivaten

Abstract: Durch Erhitzen von a-Aroyl-N-methyl-pyrrolidonen-(2) in konz. Salzsaure unter RUcMuB oder im Bombenrohr bilden sich N-Methyl-2-aryld*-pyroline. die zu den entsprechenden Pyrrolidinen hydriert werden. d,l-Nicotin und dessen Isomere werden nach diesem Reaktionsschema dargestellt. Aus a-Aroyl-N-acylpyrrolidonen-(2) erhalt man 2-Aryl-A1-pyrroline.Die Kondensation von N-Methyl-pyrrolidon-(2) mit den Athylestern der Benzoesaure, Picolinsaure, Nicotinsaure und Isonicotinsaure bei Verwendung von pulverisiertem Kalium … Show more

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Cited by 32 publications
(5 citation statements)
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“…After concentration, the residue was treated with 125 mL of concentrated HCl and refluxed for 14 h. The reaction product was distilled under vacuum and yielded caramel colored myosmine. The physicochemical parameters of the product were in accordance with values reported in the literature: mp, 39-42 °C; UV, λ max 234 nm; IR, 1618 cm -1 (Korte and Schulze-Steinen, 1962); MS, m/z 146, 70% (M + ), m/z 118, 100%, m/z 105, 30%, m/z 78, 20%, m/z 51, 20% (Duffield et al, 1965;Glenn and Edwards, 1978).…”
Section: Synthesis Of Myosminesupporting
confidence: 86%
“…After concentration, the residue was treated with 125 mL of concentrated HCl and refluxed for 14 h. The reaction product was distilled under vacuum and yielded caramel colored myosmine. The physicochemical parameters of the product were in accordance with values reported in the literature: mp, 39-42 °C; UV, λ max 234 nm; IR, 1618 cm -1 (Korte and Schulze-Steinen, 1962); MS, m/z 146, 70% (M + ), m/z 118, 100%, m/z 105, 30%, m/z 78, 20%, m/z 51, 20% (Duffield et al, 1965;Glenn and Edwards, 1978).…”
Section: Synthesis Of Myosminesupporting
confidence: 86%
“…Synthesis of 4 starts from the ethylnicotinate and involves three steps in- cluding compound 1 as intermediate. The reaction mechanism of nicotinoid synthesis by this way is described as R-aroylpyrrolidone rearrangement (Spa ¨th and Bretscheider, 1928;Korte and Schulze-Steinen, 1962). Subsequent N-nitrosation using NaNO 2 /HCl yields 2 in sufficient amounts (Hu et al, 1979).…”
Section: Resultsmentioning
confidence: 99%
“…2-Phenyl-4,5 - d ihydro-3 H -pyrrole (2e). Purification by flash chromatography on silica gel (ethyl acetate/CH 2 Cl 2 /hexanes 1:1:1) provided product 2e (yield 75%) as a semisolid, lit . mp 44 °C.…”
Section: Methodsmentioning
confidence: 99%