Phosphorus oxychloride → 4-Chloro-2-(4-phenylpiperazin-1-yl)-6,7-dihydrothieno[3,2-d]pyrimidine

HRID 1788006Notes

Reaction equation

HRID 1788006 reaction equation
[C:1]1([N:7]2[CH2:12][CH2:11][N:10]([C:13]3[N:14]=[C:15](O)[C:16]4[S:21][CH2:20][CH2:19][C:17]=4[N:18]=3)[CH2:9][CH2:8]2)[CH:6]=[CH:5][CH:4]=[CH:3][CH:2]=1.P(Cl)(Cl)([Cl:25])=O>>[Cl:25][C:15]1[C:16]2[S:21][CH2:20][CH2:19][C:17]=2[N:18]=[C:13]([N:10]2[CH2:11][CH2:12][N:7]([C:1]3[CH:6]=[CH:5][CH:4]=[CH:3][CH:2]=3)[CH2:8][CH2:9]2)[N:14]=1

Participants

3

Reactant 2

HCID 24813Phosphorus oxychlorideHCID 178517891HCID 178517891, compound

Product 1

HCID 866162644-Chloro-2-(4-phenylpiperazin-1-yl)-6,7-dihydrothieno[3,2-d]pyrimidineYield 100%

Conditions

Temperature
120 °C

Procedure

4.3 g (13.7 mmol) of 2-(4-phenylpiperazin-1-yl)-6,7-dihydrothieno[3,2-d]pyrimidin-4-ol (IV) and 25 mL of phosphorus oxychloride are combined and stirred for 5 hours at 120° C. Excess phosphorus oxychloride is concentrated by evaporation, the residue is combined with ice water and dichloromethane. The organic phase is separated off and evaporated to dryness. The residue is triturated with water, suction filtered, and dried. 5.6 g of the product (100%) is obtained as a powder.

Workup

  1. concentrationExcess phosphorus oxychloride is concentrated by evaporation
  2. customThe organic phase is separated off
  3. customevaporated to dryness
  4. customThe residue is triturated with water, suction
  5. filtrationfiltered
  6. customdried

Sources & evidence

ORD record
ord-e67100e028104d82b6f073f5d26f514b
Source dataset
uspto-grants-2009_03
Patent number
US07511045B2

Reaction notes

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