Diethyl Ether → 4-[6-(8-Cyclopentyl-6-methyl-7-oxo-7,8-dihydro-pyrido[2,3-d]pyrimidin-2-ylamino)-pyridin-3-yl]-piperazine-1-carboxylic acid tert-butyl ester

HRID 586464Notes

Reaction equation

[CH:1]1([N:6]2[C:11]3[N:12]=[C:13](S(C)=O)[N:14]=[CH:15][C:10]=3[CH:9]=[C:8]([CH3:19])[C:7]2=[O:20])[CH2:5][CH2:4][CH2:3][CH2:2]1.[C:21]([O:25][C:26]([N:28]1[CH2:33][CH2:32][N:31]([C:34]2[CH:35]=[N:36][C:37]([NH2:40])=[CH:38][CH:39]=2)[CH2:30][CH2:29]1)=[O:27])([CH3:24])([CH3:23])[CH3:22].C(OCC)C>C1(C)C=CC=CC=1>[C:21]([O:25][C:26]([N:28]1[CH2:33][CH2:32][N:31]([C:34]2[CH:35]=[N:36][C:37]([NH:40][C:13]3[N:14]=[CH:15][C:10]4[CH:9]=[C:8]([CH3:19])[C:7](=[O:20])[N:6]([CH:1]5[CH2:5][CH2:4][CH2:3][CH2:2]5)[C:11]=4[N:12]=3)=[CH:38][CH:39]=2)[CH2:30][CH2:29]1)=[O:27])([CH3:24])([CH3:22])[CH3:23]

Participants

Conditions

Temperature: 100 °C

Procedure

8-Cyclopentyl-6-methyl-2-methanesulfinyl-8H-pyrido[2,3-d]pyrimidin-7-one (1.0 g, 3.43 mmol) was added to 4-(6-amino-pyridin-3-yl)-piperazine-1-carboxylic acid tert-butyl ester (1.91 g, 6.86 mmol) in toluene (5 ml). The mixture was heated to 100° C. over 18 hours then treated with diethyl ether to produce a precipitate. This precipitate was collected by filtration then dried in vacuo to provide 4-[6-(8-cyclopentyl-6-methyl-7-oxo-7,8-dihydro-pyrido[2,3-d]pyrimidin-2-ylamino)-pyridin-3-yl]-piperazine-1-carboxylic acid tert-butyl ester as a yellow solid (0.411 g). MS (APCI) M++1: Calc'd, 506.28. Found 506.2.

Workup

customto produce a precipitate
filtrationThis precipitate was collected by filtration
customthen dried in vacuo

Sources & evidence

ORD record: ord-4c1b31a1815b431481e9d3e94adb9e52
Source dataset: uspto-grants-2005_08
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US06936612B2

Reaction notes

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