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 → 8-cyclopentyl-6-methyl-2-(5-piperazin-1-yl-pyridin-2-ylamino)-8H-pyrido[2,3-d]pyrimidin-7-one hydrochloride

HRID 586465Notes

Reaction equation

HRID 586465 reaction equation
C(OC([N:8]1[CH2:13][CH2:12][N:11]([C:14]2[CH:15]=[N:16][C:17]([NH:20][C:21]3[N:22]=[CH:23][C:24]4[CH:30]=[C:29]([CH3:31])[C:28](=[O:32])[N:27]([CH:33]5[CH2:37][CH2:36][CH2:35][CH2:34]5)[C:25]=4[N:26]=3)=[CH:18][CH:19]=2)[CH2:10][CH2:9]1)=O)(C)(C)C.CO.C(Cl)(Cl)[Cl:41]>>[ClH:41].[CH:33]1([N:27]2[C:25]3[N:26]=[C:21]([NH:20][C:17]4[CH:18]=[CH:19][C:14]([N:11]5[CH2:10][CH2:9][NH:8][CH2:13][CH2:12]5)=[CH:15][N:16]=4)[N:22]=[CH:23][C:24]=3[CH:30]=[C:29]([CH3:31])[C:28]2=[O:32])[CH2:37][CH2:36][CH2:35][CH2:34]1

Participants

3

Reactant 2

HCID 112491584-[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 esterHCID 21584188Chloroform methanol

Product 1

HCID 101949808-cyclopentyl-6-methyl-2-(5-piperazin-1-yl-pyridin-2-ylamino)-8H-pyrido[2,3-d]pyrimidin-7-one hydrochloride

Procedure

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 (0.411 g, 0.813 mmol), prepared as in Example 19, was dissolved in a 1:1 mixture of methanol/chloroform, purged with anhydrous hydrogen chloride gas, stirred for 2 hours at room temperature and a solid precipitated by addition of diethyl ether. The suspension was filtered and the residue dried in vacuo yielding 8-cyclopentyl-6-methyl-2-(5-piperazin-1-yl-pyridin-2-ylamino)-8H-pyrido[2,3-d]pyrimidin-7-one hydrochloride as a yellow solid (0.393 g). (APCI); M++1: Calc'd, 406.50. Found, 406.2. Analyses for C22H27N7O.2.85 H2O.2.2HCl: Calc'd: C, 49.20; H, 6.55; N, 18.26; Cl (ionic), 14.52; H2O, 9.56. Found: C, 49.43; H, 6.32; N, 17.87; Cl (ionic), 14.38; H2O, 7.35.

Workup

  1. custompurged with anhydrous hydrogen chloride gas
  2. customa solid precipitated by addition of diethyl ether
  3. filtrationThe suspension was filtered
  4. customthe residue dried in vacuo

Sources & evidence

ORD record
ord-77918e71690240c8bc0b95a786563fe5
Source dataset
uspto-grants-2005_08
Patent number
US06936612B2

Reaction notes

Loading…