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HuagongsheHuagongshe Chemistry Print Report · For research reference only
HRID 1930666Generated: November 1, 2026

Hydrochloric Acid → N4-Ethyl-N2-(4-(oxazol-5-yl)phenyl)-N4-((tetrahydrofuran-2-yl)methyl)-5,6,7,8-tetrahydropyrido[4,3-d]pyrimidine-2,4-diamine

https://huagongshe.com/reaction/1930666

Reaction equation

Participants

RoleNameHCIDCharge
ReactantHydrochloric AcidHCID 313—
Reactanttert-Butyl 4-(ethyl((tetrahydrofuran-2-yl)methyl)amino)-2-(4-(oxazol-5-yl)phenylamino)-7,8-dihydropyrido[4,3-d]pyrimidine-6(5H)-carboxylateHCID 59333809—
SolventMethanolHCID 887—
ProductN4-Ethyl-N2-(4-(oxazol-5-yl)phenyl)-N4-((tetrahydrofuran-2-yl)methyl)-5,6,7,8-tetrahydropyrido[4,3-d]pyrimidine-2,4-diamineHCID 59333759—

Reaction Conditions

Temperature80 °C

Reaction Steps

tert-Butyl 4-(ethyl((tetrahydrofuran-2-yl)methyl)amino)-2-(4-(oxazol-5-yl)phenylamino)-7,8-dihydropyrido[4,3-d]pyrimidine-6(5H)-carboxylate (320 mg, 0.61 mmol) was dissolved in methanol (5 mL). Hydrochloric acid (0.019 mL, 0.61 mmol) was added and the reaction mixture was stirred at 80° C. for 1 h. The solvent was evaporated under reduced pressure and the crude was used as such in the subsequent step. MS (ES+) m/z 421.0 (M+H)+

Provenance & Evidence

DOI10.6084/m9.figshare.5104873.v1
Patent numberUS08188101B2
Source datasetuspto-grants-2012_05
ORD IDord-24c9e705f44341d49d6da4089fa54b14
Source noteuspto-grants-2012_05