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HuagongsheHuagongshe Chemistry Print Report · For research reference only
HRID 375854Generated: November 1, 2026

Ammonium Hydroxide → 1-ethyl-4-chloro-6-methoxy-1H-pyrazolo[3,4-b]quinoline

https://huagongshe.com/reaction/375854

Reaction equation

Participants

RoleNameHCIDCharge
ReactantAmmonium HydroxideHCID 14923—
ReactantPhosphorus oxychlorideHCID 24813—
ReactantN-(1-ethylpyrazol-5-yl)-5-methoxyanthranilic acidHCID 19592240—
Product1-ethyl-4-chloro-6-methoxy-1H-pyrazolo[3,4-b]quinolineHCID 19592212—

Reaction Steps

A mixture of N-(1-ethylpyrazol-5-yl)-5-methoxyanthranilic acid (27.5 g, 0.105 mol) and POCl3 (60 ml) was refluxed overnight. The reaction mixture was poured into ice-water, basified with NH4OH and the solid which formed was collected by filtration to afford 20 g of 4-chloro-1-ethyl-6-methoxy-1H-pyrazolo[3,4-b]quinoline.

Provenance & Evidence

DOI10.6084/m9.figshare.5104873.v1
Patent numberUS05488055
Source datasetuspto-grants-1996_01
ORD IDord-7635fe0296304b05aad2ff529bb07724
Source noteuspto-grants-1996_01