Lirucitinib

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Lirucitinib

CAS 2458115-78-9

MF C16H25N5OS MW335.5 g/mol

N-[4-[(ethylsulfonimidoyl)methyl]cyclohexyl]-N-methyl-7H-pyrrolo[2,3-d]pyrimidin-4-amine

(R)-ethyl(imino)({trans-4-[methyl(7H-pyrrolo[2,3-d]pyrimidin-4-yl)amino]cyclohexyl}methyl)-λ6
-sulfanone
Janus tyrosine kinase inhibitor, anti-inflammatory, GGW101, GGW 101

Lirucitinib is a Janus kinase (JAK) inhibitor primarily known as a novel, Class I veterinary drug. It specifically targets the JAK1 enzyme to block itch-inducing (pruritic) and inflammation-causing cytokines in the body.

Core Information

Primary Use: The drug is developed for veterinary medicine to treat acute and chronic pruritic (severe itch) skin diseases in dogs, which are commonly caused by allergies, parasites, or infections.
Approval Status: It received a Class I New Veterinary Drug Certificate from the Ministry of Agriculture and Rural Affairs (MARA) in China.
Human Medicine: As of 2026, there are no clinical indications or indications that Lirucitinib is being tested for use in humans.
Chemical Profile: It is an orally active small molecule with the chemical formula C₁₆H₂₅N₅OS and acts specifically as the (R)-enantiomer of the compound.

SYN

[US20220106319A1]

https://patentscope.wipo.int/search/en/detail.jsf;jsessionid=4CA57DF508E7B72B516CEB2A97283182.wapp2nC?docId=US356967355&_cid=P22-MQQ0KW-29134-1

11 (1.0 g, 2.04 mmol) (prepared in step 9), tetrahydrofuran/methanol (10 mL), and cesium carbonate (1.33 g, 4.08 mmol) were added into a 25 mL single-necked flask, refluxed for 12 h, concentrated, and poured into dichloromethane and saturated salt solution, the organic phase was dried with anhydrous sodium sulfate, concentrated, and subjected to a conventional preparation method and a chiral preparation method to obtain product A as a white solid (20 mg, yield: 2.9%), LC-MS: 336 [M+H]+, H ¹-NMR: ¹H NMR (400 MHz, DMSO) δ 11.61 (s, 1H), 8.09 (s, 1H), 7.13 (s, 1H), 6.54 (s, 1H), 4.67 (s, 1H), 3.90-3.83 (m, 1H), 3.17 (s, 3H), 3.06-2.93 (m, 4H), 2.12-2.01 (m, 3H), 1.73-1.70 (m, 4H), 1.31-1.22 (m, 5H) and product B as a white solid (25 mg, yield: 3.7%), LC-MS: 336 [M+H]+, H ¹—NMR: ¹H NMR (400 MHz, DMSO) δ 11.59 (s, 1H), 8.09 (s, 1H), 7.12 (dd, J=3.3, 2.6 Hz, 1H), 6.54 (s, 1H), 4.67 (s, 1H), 3.58 (s, 1H), 3.17 (s, 3H), 3.06-2.89 (m, 4H), 2.16-1.93 (m, 3H), 1.74-1.69 (m, 4H), 1.25-1.23 (m, 5H).

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