Reference of 102359-00-2, These common heterocyclic compound, 102359-00-2, name is 2-Oxoindoline-5-carboxylic Acid, its traditional synthetic route has been very mature, but the traditional synthetic route has various shortcomings, such as complicated route, low yield, poor purity, etc, below Introduce a new synthetic route.
Step A: (3Z)-1-Acetyl-3-(ethoxymethylene)-2-oxoindoline-5-carboxylic acid A mixture of 2-oxoindoline-5-carboxylic acid (5.221 g, 29.50 mmol) and triethylorthoformate (13.320 g, 90 mmol) in acetic anhydride (75 mL) were stirred at 100 C for 8 h. The solvent was removed under reduced pressure. The residue was stirred with i-Pr2O (250 mL) for 2 h to give a solid, which was filtered and washed with i-Pr2O to provide (3Z)-1-acetyl-3-(ethoxymethylene)-2-oxoindoline-5-carboxylic acid (4.8 g, 59%): NMR (300 MHz, DMSO-d6) delta ppm: 12.6 (bs,1H), 8.17 (d,1H), 8.15 (s,1H), 8.05 (d,1H), 7.87 (dd,1H), 4.54 (q,2H), 2.62 (s,3H), 1.41 (t,3H); tR: 3.17 min; MS (ESI): m/z (M+H)+ 276; (M+H)- 274.
The synthetic route of 102359-00-2 has been constantly updated, and we look forward to future research findings.
Reference:
Patent; Max-Planck-Gesellschaft zur Foerderung der Wissenschaften e.V.; Ullrich, Axel; Falcenberg, Mathias; Oerfi, Zoltan; EP2837626; (2015); A1;,
Indoline – Wikipedia,
Indoline | C8H9N – PubChem