75092-30-7, name is 4-Iodo-1-methyl-1H-pyrazole-5-carboxylic acid, belongs to pyrazoles-derivatives compound, is considered to be a conventional heterocyclic compound, which is widely used in drug synthesis. The chemical synthesis route is as follows. Safety of 4-Iodo-1-methyl-1H-pyrazole-5-carboxylic acid
Step 1. 4-[(4-Benzylphenyl)amino]-1-methyl-1H-pyrazole-5-carboxylic acid A mixture of 4-iodo-1-methyl-1H-pyrazole-5-carboxylic acid ((Manaev, Yu. A. et al., J. Gen. Chem. USSR (Engl. Transl.), 1982, 52 (11), 2291), 8.0 g, 31.74 mmol), 4-benzylaniline (21.03 g, 114.76 mmol) and copper powder (3.2 g) in a mixture of 5% aqueous sodium carbonate (160 ml) and dimethylsulfoxide (80 ml) was stirred for 17 h at 100 C. After cooling to room temperature, the mixture was filtered through a pad of Celite, which was washed with water, 2N aqueous sodium hydroxide and diethyl ether. The separated water layer was washed with diethyl ether (100 ml*2). The water layer was acidified with concentrated hydrochloric acid and the formed solid was collected by filtration, dried, to give 4.86 g (50%) of the pure title compound as a pale brown solid. Rf value: 0.50 (methanol/dichloromethane/acetic acid=1/10/2 drops). 1H-NMR (DMSO-d6) delta: 7.63 (1 H, s), 7.50 (1 H, br s), 7.31-6.96 (9 H, m), 4.00 (3 H, s), 3.85 (2 H, s). One signal was not observed.
The synthetic route of 75092-30-7 has been constantly updated, and we look forward to future research findings.
Reference:
Patent; Kawamura, Kiyoshi; Mihara, Sachiko; Nukui, Seiji; Uchida, Chikara; US2003/130277; (2003); A1;,
Pyrazole – Wikipedia,
Pyrazoles – an overview | ScienceDirect Topics