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HuagongsheHuagongshe Chemistry Print Report · For research reference only
HRID 497037Generated: October 26, 2026

Phosphorus oxychloride → 6-Chloro-3-(isoxazol-3-yl)-imidazo[5,1-a]phthalazine

https://huagongshe.com/reaction/497037

Reaction equation

Participants

RoleNameHCIDCharge
ReactantPhosphorus oxychlorideHCID 24813—
ReactantIsoxazol-3-carboxylic acid (4-oxo-3,4-dihydrophthalazin-1-ylmethyl)amideHCID 86593723—
Product6-Chloro-3-(isoxazol-3-yl)-imidazo[5,1-a]phthalazineHCID 22318516—

Reaction Steps

The title compound was prepared from isoxazol-3-carboxylic acid (4-oxo-3,4-dihydrophthalazin-1-ylmethyl)amide (Part a) and phosphorus oxychloride according the procedure described in Example 1, Part b. 1H NMR (360 MHz, CDCl3) δ 7.25 (s, 1H), 7.66 (t, J=8 Hz, 1H), 7.86 (t, J=8 Hz, 1H), 7.97 (brs, 1H), 8.09 (d, J=8 Hz, 1H), 8.21 (d, J=8 Hz, 1H), 8.57 (d, J=2 Hz, 1H).

Provenance & Evidence

DOI10.6084/m9.figshare.5104873.v1
Patent numberUS06949549B2
Source datasetuspto-grants-2005_09
ORD IDord-26ac49f3e43c49098bc0b3d46bf62309
Source noteuspto-grants-2005_09