Acetonitrile → Toluene-4-sulfonic acid 3-cyclopropyl-8-methyl-1-(3-nitrophenyl)-2,4,7-trioxo-1,2,3,4,7,8-hexahydro-pyrido[2,3-d]pyrimidin-5-yl ester

HRID 75631Notes

Reaction equation

HRID 75631 reaction equation
[CH:1]1([N:4]2[C:9](=[O:10])[C:8]3[C:11]([OH:17])=[CH:12][C:13](=[O:16])[N:14]([CH3:15])[C:7]=3[N:6]([C:18]3[CH:23]=[CH:22][CH:21]=[C:20]([N+:24]([O-:26])=[O:25])[CH:19]=3)[C:5]2=[O:27])[CH2:3][CH2:2]1.C(#N)C.[S:31](Cl)([C:34]1[CH:40]=[CH:39][C:37]([CH3:38])=[CH:36][CH:35]=1)(=[O:33])=[O:32]>C(N(CC)CC)C>[CH:1]1([N:4]2[C:9](=[O:10])[C:8]3[C:11]([O:17][S:31]([C:34]4[CH:40]=[CH:39][C:37]([CH3:38])=[CH:36][CH:35]=4)(=[O:33])=[O:32])=[CH:12][C:13](=[O:16])[N:14]([CH3:15])[C:7]=3[N:6]([C:18]3[CH:23]=[CH:22][CH:21]=[C:20]([N+:24]([O-:26])=[O:25])[CH:19]=3)[C:5]2=[O:27])[CH2:2][CH2:3]1

Participants

5

Reactant 3

HCID 6342AcetonitrileHCID 73974-Toluenesulfonyl chlorideHCID 597172003-cyclopropyl-5-hydroxy-8-methyl-1-(3-nitrophenyl)-1H,8H-pyrido[2,3-d]pyrimidine-2,4,7-trione

Product 1

HCID 59717031Toluene-4-sulfonic acid 3-cyclopropyl-8-methyl-1-(3-nitrophenyl)-2,4,7-trioxo-1,2,3,4,7,8-hexahydro-pyrido[2,3-d]pyrimidin-5-yl esterYield 82.4%

Reagents, catalysts & solvents 1

HCID 8471TriethylamineSolvent

Conditions

Temperature
110 °C

Procedure

To 3-cyclopropyl-5-hydroxy-8-methyl-1-(3-nitrophenyl)-1H,8H-pyrido[2,3-d]pyrimidine-2,4,7-trione 10 (18 g) obtained in Step 5 were added acetonitrile (180 ml), tosyl chloride 11 (11 g) and triethylamine (8 ml), and the mixture was stirred with heating under reflux at 110° C. for 1 hr. The reaction mixture was concentrated under reduced pressure. Water (100 ml) was added to the residue and the mixture was extracted with chloroform (800 ml). The organic layer was washed with brine (50 ml), dried over anhydrous magnesium sulfate, and concentrated under reduced pressure. The residue was recrystallized from chloroform:diethyl ether=1:5 to give toluene-4-sulfonic acid 3-cyclopropyl-8-methyl-1-(3-nitrophenyl)-2,4,7-trioxo-1,2,3,4,7,8-hexahydro-pyrido[2,3-d]pyrimidin-5-yl ester 12 (21 g, 82%) as a white solid.

Workup

  1. temperaturewith heating
  2. concentrationThe reaction mixture was concentrated under reduced pressure
  3. additionWater (100 ml) was added to the residue
  4. extractionthe mixture was extracted with chloroform (800 ml)
  5. washThe organic layer was washed with brine (50 ml)
  6. dry with materialdried over anhydrous magnesium sulfate
  7. concentrationconcentrated under reduced pressure
  8. customThe residue was recrystallized from chloroform

Sources & evidence

ORD record
ord-1857ba0daa8348218256f133e7473108
Source dataset
uspto-grants-2014_09
Patent number
US08835443B2

Reaction notes

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