Azetidine → HCID 57378955, compound

HRID 1802142Notes

Reaction equation

[CH3:1][N:2]1[C:6]([C:7](=[O:24])[NH:8][C:9]2[CH:14]=[CH:13][N:12]3[N:15]=[C:16]([C:18]4[CH:23]=[CH:22][CH:21]=[CH:20][CH:19]=4)[N:17]=[C:11]3[CH:10]=2)=[C:5]([C:25]([OH:27])=O)[CH:4]=[N:3]1.[NH:28]1[CH2:31][CH2:30][CH2:29]1.CCCP(=O)=O>O1CCCC1>[C:18]1([C:16]2[N:17]=[C:11]3[CH:10]=[C:9]([NH:8][C:7]([C:6]4[N:2]([CH3:1])[N:3]=[CH:4][C:5]=4[C:25]([N:28]4[CH2:31][CH2:30][CH2:29]4)=[O:27])=[O:24])[CH:14]=[CH:13][N:12]3[N:15]=2)[CH:19]=[CH:20][CH:21]=[CH:22][CH:23]=1

Participants

Conditions

Temperature: 70 °C

Procedure

A mixture of 1-methyl-5-(2-phenyl-[1,2,4]triazolo[1,5-a]pyridin-7-ylcarbamoyl)-1H-pyrazole-4-carboxylic acid (4.5 g, 12.4 mmol), azetidine (2.53 ml, 37.3 mmole), N-diisopropylethylamine (6.51 ml, 37.3 mmol) and propylphosphonic anhydride (50% in ethyl acetate, 18.3 ml, 31 mmol) in tetrahydrofurane (220 ml) is stirred for 2 hours at 70° C. The turbid solution is concentrated to about 100 ml, cooled, poured on cooled sat. aqueous sodium bicarbonate solution (1000 ml) and the suspension is stirred for 20 minutes. The solid is collected by filtration, washed with little water and dried affording 4-(azetidine-1-carbonyl)-2-methyl-2H-pyrazole-3-carboxylic acid (2-phenyl-[1,2,4]triazolo[1,5-a]pyridin-7-yl)-amide (5 g, 100%) as a white solid. mp.: 243-5° C. MS: m/z=402.3 (M+H+).

Workup

concentrationThe turbid solution is concentrated to about 100 ml
temperaturecooled
additionpoured
temperatureon cooled sat. aqueous sodium bicarbonate solution (1000 ml)
stirringthe suspension is stirred for 20 minutes
filtrationThe solid is collected by filtration
washwashed with little water
customdried

Sources & evidence

ORD record: ord-51fd1d1a030042f48c14a9536549251d
Source dataset: uspto-grants-2013_01
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08349824B2

Reaction notes

Loading…