Triphenylphosphine → Tert-butyl 4-(7-bromo-2-chloroquinazolin-8-yloxy)piperidine-1-carboxylate

HRID 2079620Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 2079620
CCOC(/N=N/C(OCC)=O)=O.[Br:13][C:14]1[C:23]([OH:24])=[C:22]2[C:17]([CH:18]=[N:19][C:20]([Cl:25])=[N:21]2)=[CH:16][CH:15]=1.O[CH:27]1[CH2:32][CH2:31][N:30]([C:33]([O:35][C:36]([CH3:39])([CH3:38])[CH3:37])=[O:34])[CH2:29][CH2:28]1.C1C=CC(P(C2C=CC=CC=2)C2C=CC=CC=2)=CC=1>C1COCC1>[Br:13][C:14]1[C:23]([O:24][CH:27]2[CH2:32][CH2:31][N:30]([C:33]([O:35][C:36]([CH3:39])([CH3:38])[CH3:37])=[O:34])[CH2:29][CH2:28]2)=[C:22]2[C:17]([CH:18]=[N:19][C:20]([Cl:25])=[N:21]2)=[CH:16][CH:15]=1

Komponenten

6

Edukt 4

HCID 11776TriphenylphosphineHCID 643502Tert-butyl 4-hydroxypiperidine-1-carboxylateHCID 5462977Diethyl azodicarboxylateHCID 591992277-Bromo-2-chloroquinazolin-8-ol

Produkt 1

HCID 59199246Tert-butyl 4-(7-bromo-2-chloroquinazolin-8-yloxy)piperidine-1-carboxylateAusbeute 80 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 8028TetrahydrofuranLösungsmittel2×

Versuchsvorschrift

A solution of DEAD (404 mg, 2.32 mmole) in THF (0.5 mL) was added to a solution of 7-bromo-2-chloroquinazolin-8-ol (400 mg, 1.54 mmole), tert-butyl 4-hydroxypiperidine-1-carboxylate (621 mg, 3.09 mmole) and PPh3 (610 mg, 2.32 mmole) in THF (5.5 mL) at RT. After 1.5 hours, silica gel was added to the reaction which was evaporated to dryness and loaded onto a flash column. The product was eluted with 25% EtOAc/hexane to give tert-butyl 4-(7-bromo-2-chloroquinazolin-8-yloxy)piperidine-1-carboxylate in 80% yield (545 mg, 1.23 mmole).

Aufarbeitung

  1. additionsilica gel was added to the reaction which
  2. customwas evaporated to dryness
  3. washThe product was eluted with 25% EtOAc/hexane

Quellen und Nachweise

ORD-Eintrag
ord-8756415a21a742d1bd0526ede76d7254
Quelldatensatz
uspto-grants-2011_04
Patentnummer
US07932262B2

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