Benzyl Alcohol → 6-cyano-3,4-dihydro-2,2-dimethyl-trans-3-hydroxy-4-(4-benzyloxy-2-oxo-3-pyrrolin-1-yl)-2H-1-benzopyran

HRID 1460837Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 1460837
[C:1]([C:3]1[CH:4]=[CH:5][C:6]2[O:11][C:10]([CH3:13])([CH3:12])[C@@H:9]([OH:14])[C@H:8]([N:15]3[CH2:19][C:18]([O:20][CH3:21])=[CH:17][C:16]3=[O:22])[C:7]=2[CH:23]=1)#[N:2].C(O)[C:25]1[CH:30]=[CH:29][CH:28]=[CH:27][CH:26]=1.CS(O)(=O)=O>C(OCC)C>[C:1]([C:3]1[CH:4]=[CH:5][C:6]2[O:11][C:10]([CH3:13])([CH3:12])[C@@H:9]([OH:14])[C@H:8]([N:15]3[CH2:19][C:18]([O:20][CH2:21][C:25]4[CH:30]=[CH:29][CH:28]=[CH:27][CH:26]=4)=[CH:17][C:16]3=[O:22])[C:7]=2[CH:23]=1)#[N:2]

Komponenten

5

Edukt 3

HCID 244Benzyl AlcoholHCID 6395Methanesulfonic AcidHCID 679241126-cyano-3,4-dihydro-2,2-dimethyl-trans-3-hydroxy-4-(4-methoxy-2-oxo-3-pyrrolin-1-yl)-2H-1-benzopyran

Produkt 1

HCID 150075876-cyano-3,4-dihydro-2,2-dimethyl-trans-3-hydroxy-4-(4-benzyloxy-2-oxo-3-pyrrolin-1-yl)-2H-1-benzopyran

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 3283Diethyl EtherLösungsmittel

Reaktionsbedingungen

Temperatur
80 °C

Versuchsvorschrift

A mixture of 6-cyano-3,4-dihydro-2,2-dimethyl-trans-3-hydroxy-4-(4-methoxy-2-oxo-3-pyrrolin-1-yl)-2H-1-benzopyran (0.7 g), benzyl alcohol (0.92 ml) and methanesulfonic acid (0.01 g) was heated at 80° C. for 3 hours under reduced pressure (40 mbars). After cooling the residue was stirred with diethylether, and the insoluble product filtered off and washed twice with diethylether, to give 6-cyano-3,4-dihydro-2,2-dimethyl-trans-3-hydroxy-4-(4-benzyloxy-2-oxo-3-pyrrolin-1-yl)-2H-1-benzopyran, m.p. 248° C.

Aufarbeitung

  1. temperatureAfter cooling the residue
  2. filtrationthe insoluble product filtered off
  3. washwashed twice with diethylether

Quellen und Nachweise

ORD-Eintrag
ord-2da7295ba98e4c93a1ed3703983b2a38
Quelldatensatz
uspto-grants-1991_12
Patentnummer
US05072006

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