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HuagongsheHuagongshe Chemistry Print Report · For research reference only
HRID 635984Generated: October 25, 2026

Methanol → 9-(3-bromo-4-fluorophenyl)-2-methyl-2,3,5,9-tetrahydropyrano[3,4-b]pyrrolo[3,4-e]pyridine-1,8(4H,7H)-dione

https://huagongshe.com/reaction/635984

Reaction equation

Participants

RoleNameHCIDCharge
ReactantMethanolHCID 887—
ReactantMethylamineHCID 6329—
Reactantmethyl 4-(3-bromo-4-fluorophenyl)-2-(bromomethyl)-5-oxo-4,5,6,8-tetrahydro-1H-pyrano[3,4-b]pyridine-3-carboxylateHCID 11328992—
Product9-(3-bromo-4-fluorophenyl)-2-methyl-2,3,5,9-tetrahydropyrano[3,4-b]pyrrolo[3,4-e]pyridine-1,8(4H,7H)-dioneHCID 9821906—

Reaction Steps

A solution of the product from Example 25B (0.16 g, 0.34 mmol) and 2M methyl amine in methanol (3.5 mL, 7.0 mmol) was stirred at ambient temperature for 16 hours and concentrated. Purification of the residue on silica gel (5% and then 10% methanol in methylene chloride) provided an oil which was crystallized from ethanol, collected by filtration and dried to yield the title compound (0.016 g) as a white solid.

Provenance & Evidence

DOI10.6084/m9.figshare.5104873.v1
Patent numberUS06191140B1
Source datasetuspto-grants-2001_02
ORD IDord-83cdde836ff04624b4434d0891c952e8
Source noteuspto-grants-2001_02