Triphenylphosphine → 9-benzyloxy-6-(2-bromobenzyl)-2-isopropyl-3,4-dihydro-2H-pyrazino[1,2-c]pyrimidine-1,8-dione

HRID 2169239Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 2169239
O[CH2:2][CH2:3][N:4]([CH:30]([CH3:32])[CH3:31])[C:5]([C:7]1[C:12]([O:13][CH2:14][C:15]2[CH:20]=[CH:19][CH:18]=[CH:17][CH:16]=2)=[C:11]([OH:21])[N:10]=[C:9]([CH2:22][C:23]2[CH:28]=[CH:27][CH:26]=[CH:25][C:24]=2[Br:29])[N:8]=1)=[O:6].C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.CCOC(/N=N/C(OCC)=O)=O>ClCCl>[CH2:14]([O:13][C:12]1[C:11](=[O:21])[N:10]=[C:9]([CH2:22][C:23]2[CH:28]=[CH:27][CH:26]=[CH:25][C:24]=2[Br:29])[N:8]2[CH2:2][CH2:3][N:4]([CH:30]([CH3:32])[CH3:31])[C:5](=[O:6])[C:7]=12)[C:15]1[CH:16]=[CH:17][CH:18]=[CH:19][CH:20]=1

Komponenten

5

Edukt 3

HCID 11776TriphenylphosphineHCID 5462977Diethyl azodicarboxylateHCID 178457447HCID 178457447, Verbindung

Produkt 1

HCID 867258609-benzyloxy-6-(2-bromobenzyl)-2-isopropyl-3,4-dihydro-2H-pyrazino[1,2-c]pyrimidine-1,8-dioneAusbeute 29 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 6344DichloromethaneLösungsmittel

Versuchsvorschrift

To a stirred solution of 5-benzyloxy-2-(2-bromobenzyl)-6-hydroxypyrimidine-4-carboxylic acid (2-hydroxyethyl)-isopropylamide (151) (400 mg, 0.8 mmol) in dichloromethane (10 mL) was added triphenyl phosphine (310.55 mg, 1.18 mmol) at room temperature. The mixture was stirred for 10 min. Then DEAD (0.186 mL, 1.18 mmol) was added at room temperature and the mixture was stirred for another 2 h. After completion of the reaction, the mixture was concentrated under reduced pressure to get a crude product, which was purified using a normal silica column using 2% methanol in dichloromethane to afford 9-benzyloxy-6-(2-bromobenzyl)-2-isopropyl-3,4-dihydro-2H-pyrazino[1,2-c]pyrimidine-1,8-dione (169) (112 mg, 29%) as a white solid.

Aufarbeitung

  1. stirringthe mixture was stirred for another 2 h
  2. customAfter completion of the reaction
  3. concentrationthe mixture was concentrated under reduced pressure
  4. customto get a crude product, which
  5. customwas purified

Quellen und Nachweise

ORD-Eintrag
ord-20928364bd284e1392c60eb837af8757
Quelldatensatz
uspto-grants-2015_06
Patentnummer
US09045486B2

Notizen zur Reaktion

Wird geladen…