trans-1,2-Diacetoxy-1,2-dihydrobenzocyclobutene → Rac-3',6',11'-triacetoxy-3'-acetyl-1',2',3',4',5',5a',6',11',11a',12'-decahydro-5',12'-dioxospiro[1,3-dithiolane-2,1'-naphthacene]

HRID 1447488Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 1447488
[C:1]([O:4][C@@H:5]1[C:8]2[CH:9]=[CH:10][CH:11]=[CH:12][C:7]=2[C@H:6]1[O:13][C:14](=[O:16])[CH3:15])(=[O:3])[CH3:2].[C:17]([O:20][C:21]1([C:37](=[O:39])[CH3:38])[CH2:30][C:29]2[C:28](=[O:31])[CH:27]=[CH:26][C:25](=[O:32])[C:24]=2[C:23]2([S:36][CH2:35][CH2:34][S:33]2)[CH2:22]1)(=[O:19])[CH3:18]>C1(C)C(C)=CC=CC=1>[C:17]([O:20][C:21]1([C:37](=[O:39])[CH3:38])[CH2:30][C:29]2[C:28](=[O:31])[CH:27]3[CH:26]([CH:5]([O:4][C:1](=[O:3])[CH3:2])[C:8]4[C:7]([CH:6]3[O:13][C:14](=[O:16])[CH3:15])=[CH:12][CH:11]=[CH:10][CH:9]=4)[C:25](=[O:32])[C:24]=2[C:23]2([S:36][CH2:35][CH2:34][S:33]2)[CH2:22]1)(=[O:19])[CH3:18]

Komponenten

4

Edukt 2

HCID 13264175trans-1,2-Diacetoxy-1,2-dihydrobenzocyclobuteneHCID 20283284Rac-3'-acetoxy-3'-acetyl-1',2',3',4',5',8'-hexahydro-5',8'-dioxospiro[1,3-dithiolane-2,1'-naphthalene]

Produkt 1

HCID 20283287Rac-3',6',11'-triacetoxy-3'-acetyl-1',2',3',4',5',5a',6',11',11a',12'-decahydro-5',12'-dioxospiro[1,3-dithiolane-2,1'-naphthacene]Ausbeute 79 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 7237O-XyleneLösungsmittel

Versuchsvorschrift

A solution of 220 mg (1.0 mmol) of trans-1,2-diacetoxy-1,2-dihydrobenzocyclobutene and 234 mg (0.66 mmol) of rac-3'-acetoxy-3'-acetyl-1',2',3',4',5',8'-hexahydro-5',8'-dioxospiro[1,3-dithiolane-2,1'-naphthalene] [prepared as described in Example 5(A)] in 15 ml of dry xylene was stirred and heated under reflux under an atmosphere of nitrogen for 30 minutes. The pale orange solution was evaporated and the resulting yellow oil was triturated with 15 ml of diethyl ether to yield 298 mg (79%) of rac-3',6',11'-triacetoxy-3'-acetyl-1',2',3',4',5',5a',6',11',11a',12'-decahydro-5',12'-dioxospiro[1,3-dithiolane-2,1'-naphthacene] in the form of a pale yellow solid of melting point 135°-145° C.

Aufarbeitung

  1. temperatureheated
  2. temperatureunder reflux under an atmosphere of nitrogen for 30 minutes
  3. customThe pale orange solution was evaporated
  4. customthe resulting yellow oil was triturated with 15 ml of diethyl ether

Quellen und Nachweise

ORD-Eintrag
ord-d028454093bd4dff9da8d5520f48005e
Quelldatensatz
uspto-grants-1982_02
Patentnummer
US04316985

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