4-Toluenesulfonyl chloride → HCID 59823038, compound

HRID 2067730Notes

Reaction equation

[OH:1][C:2]1[C:11]2[C:10](=[O:12])[N:9]([CH3:13])[CH:8]=[N:7][C:6]=2[N:5]([CH3:14])[C:4](=[O:15])[CH:3]=1.[C:16]1([CH3:26])[CH:21]=[CH:20][C:19]([S:22](Cl)(=[O:24])=[O:23])=[CH:18][CH:17]=1.C(N(CC)CC)C>C(#N)C>[CH3:26][C:16]1[CH:21]=[CH:20][C:19]([S:22]([O:1][C:2]2[C:11]3[C:10](=[O:12])[N:9]([CH3:13])[CH:8]=[N:7][C:6]=3[N:5]([CH3:14])[C:4](=[O:15])[CH:3]=2)(=[O:24])=[O:23])=[CH:18][CH:17]=1

Participants

Conditions

Temperature: 110 °C

Procedure

5-hydroxy-3,8-dimethylpyrido[2,3-d]pyrimidine-4,7(3H,8H)-dione (compound 1C, 125 mg, 0.60 mmol, 1 eq), p-toluenesulfonyl chloride (138 mg, 0.72 mmol, 1.2 eq) and triethylamine (126 μl, 0.90 mmol, 1.5 eq) were dissolved in acetonitrile (2 ml). The mixture was heated at reflux (oil bath at 110° C.) for 3 hours to yield 3,8-dimethyl-4,7-dioxo-3,4,7,8-tetrahydropyrido[2,3-d]pyrimidin-5-yl 4-methylbenzenesulfonate (compound 1D). The product was confirm by LC-MS. Solvent was removed in vacuo and the crude product 3,8-dimethyl-4,7-dioxo-3,4,7,8-tetrahydropyrido[2,3-d]pyrimidin-5-yl 4-methylbenzenesulfonateused in the following reaction.

Workup

temperatureThe mixture was heated

Sources & evidence

ORD record: ord-01c02bffd1b34294be291471d1689602
Source dataset: uspto-grants-2012_10
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08293901B2

Reaction notes

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