2,6-Diaminopyridine → 2-(6-amino-pyridin-2-ylamino)-6-bromo-8-cyclopentyl-5-methyl-8H-pyrido[2,3-d]pyrimidin-7-one

HRID 586497Notes

Reaction equation

[Br:1][C:2]1[C:14](=[O:15])[N:13]([CH:16]2[CH2:20][CH2:19][CH2:18][CH2:17]2)[C:5]2[N:6]=[C:7](S(C)=O)[N:8]=[CH:9][C:4]=2[C:3]=1[CH3:21].[NH2:22][C:23]1[CH:28]=[CH:27][CH:26]=[C:25]([NH2:29])[N:24]=1>C1(C)C=CC=CC=1>[Br:1][C:2]1[C:14](=[O:15])[N:13]([CH:16]2[CH2:20][CH2:19][CH2:18][CH2:17]2)[C:5]2[N:6]=[C:7]([NH:22][C:23]3[CH:28]=[CH:27][CH:26]=[CH:25][N:24]=3)[N:8]=[CH:9][C:4]=2[C:3]=1[CH3:21].[NH2:22][C:23]1[N:24]=[C:25]([NH:29][C:7]2[N:8]=[CH:9][C:4]3[C:3]([CH3:21])=[C:2]([Br:1])[C:14](=[O:15])[N:13]([CH:16]4[CH2:20][CH2:19][CH2:18][CH2:17]4)[C:5]=3[N:6]=2)[CH:26]=[CH:27][CH:28]=1

Participants

Conditions

Temperature: 120 °C

Procedure

A mixture of 6-bromo-8-cyclopentyl-2-methanesulfinyl-5-methyl-8H-pyrido[2,3-d]pyrimidin-7-one (370 mg, 1.0 mmol) and 2,6-diaminopyridine (163 mg, 1.5 mmol) in toluene (5 mL) was heated at 120° C. overnight. The solid formed upon cooling was collected by filtration, washed with toluene and sonicated in hot MeOH. After filtration the solid was dried further to give the desired product 2-(6-amino-pyridin-2-ylamino)-6-bromo-8-cyclopentyl-5-methyl-8H-pyrido[2,3-d]pyrimidin-7-one (39 mg, 9.3%). mp: >274.6˜276° C. Calc'd for C18H19BrN6O. 0.2H2O: C, 51.61; H, 4.67; N, 20.06. Found: C, 51.42; H, 4.44; N, 19.87.

Workup

customThe solid formed
temperatureupon cooling
filtrationwas collected by filtration
washwashed with toluene
customsonicated in hot MeOH
filtrationAfter filtration the solid
customwas dried further

Sources & evidence

ORD record: ord-491adeed9acc4e978101d1a8a8e4ecd8
Source dataset: uspto-grants-2005_08
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US06936612B2

Reaction notes

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