Guanidine Hydrochloride → 6-[4-(2-Amino-pyrimidin-4-yl)-phenyl]-5-(4-chloro-phenyl)-1-phenyl-1,5-dihydro-pyrazolo[3,4-d]pyrimidin-4-one

HRID 1693515Notes

Reaction equation

HRID 1693515 reaction equation
[Cl:1][C:2]1[CH:7]=[CH:6][C:5]([N:8]2[C:13](=[O:14])[C:12]3[CH:15]=[N:16][N:17]([C:18]4[CH:23]=[CH:22][CH:21]=[CH:20][CH:19]=4)[C:11]=3[N:10]=[C:9]2[C:24]2[CH:29]=[CH:28][C:27]([C:30](=O)[CH:31]=[CH:32]N(C)C)=[CH:26][CH:25]=2)=[CH:4][CH:3]=1.Cl.[NH2:38][C:39]([NH2:41])=[NH:40].[OH-].[Na+].[NH4+].[Cl-]>CO>[NH2:40][C:39]1[N:41]=[C:30]([C:27]2[CH:26]=[CH:25][C:24]([C:9]3[N:8]([C:5]4[CH:4]=[CH:3][C:2]([Cl:1])=[CH:7][CH:6]=4)[C:13](=[O:14])[C:12]4[CH:15]=[N:16][N:17]([C:18]5[CH:23]=[CH:22][CH:21]=[CH:20][CH:19]=5)[C:11]=4[N:10]=3)=[CH:29][CH:28]=2)[CH:31]=[CH:32][N:38]=1

Participants

6

Reactant 4

HCID 5742Guanidine HydrochlorideHCID 14798Sodium HydroxideHCID 25517Ammonium ChlorideHCID 672827725-(4-Chloro-phenyl)-6-[4-(3-dimethylamino-acryloyl)-phenyl]-1-phenyl-1,5-dihydro-pyrazolo[3,4-d]pyrimidin-4-one

Product 1

HCID 578980476-[4-(2-Amino-pyrimidin-4-yl)-phenyl]-5-(4-chloro-phenyl)-1-phenyl-1,5-dihydro-pyrazolo[3,4-d]pyrimidin-4-one

Reagents, catalysts & solvents 1

HCID 887MethanolSolvent

Procedure

A suspension of 5-(4-chloro-phenyl)-6-[4-(3-dimethylamino-acryloyl)-phenyl]-1-phenyl-1,5-dihydro-pyrazolo[3,4-d]pyrimidin-4-one (24 mg, 0.048 mmol) in MeOH (1 mL) is treated with guanidine hydrochloride (12 mg, 0.13 mmol) and NaOH (4 mg, 0.1 mmol) at 80° C. for 34 h. After cooling down to room temperature, the mixture is treated with saturated aqueus NH4Cl solution (2 mL) and extracted with EtOAc (3×2 mL). The organic layers are concentrated and purified by preparative thin layer chromatography (silica gel, 2.5% MeOH/CH2Cl2) to provide the titled compound 6-[4-(2-amino-pyrimidin-4-yl)-phenyl]-5-(4-chloro-phenyl)-1-phenyl-1,5-dihydro-pyrazolo[3,4-d]pyrimidin-4-one as a white solid. 1H NMR (CDCl3) δ(ppm) 8.35(b, 1H), 8.34(s, 1H), 8.14 (d, 2H), 7.92 (d, 2H), 7.51 (t, 2H), 7.46 (d, 2H), 7.35(t, 1H), 7.32(d, 2H), 7.12(d, 2H), 7.03(d, 1H), 5.34(b, 2H); HPLC-MS calculated for C27H18ClN7O (M+H+): 492.1. Found: 492.2.

Workup

  1. extractionextracted with EtOAc (3×2 mL)
  2. concentrationThe organic layers are concentrated
  3. custompurified by preparative thin layer chromatography (silica gel, 2.5% MeOH/CH2Cl2)

Sources & evidence

ORD record
ord-3da1820876ff43cc9f6ca99d1e3e23ce
Source dataset
uspto-grants-2012_04
Patent number
US08158634B2

Reaction notes

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