Reference of 172078-33-0, These common heterocyclic compound, 172078-33-0, name is Indolin-5-ol, 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.
Take one 100mL eggplant-shaped bottle, add 0.54g (4.00mmol) 5-hydroxyindoline, 1.36g (4.16mmol) Cs2CO3 and 30mL absolute ethanol, stir at room temperature for 1h, and 0.79g (3.97mmol) 3a- 1 or 3a-2 and 0.10g (0.60mmol) KI were put into the reaction solution, and the reaction was refluxed at 80 for more than 4h. The progress of the reaction was monitored by thin layer chromatography until the 5-hydroxyindoline point completely disappeared, and vacuum distillation The solvent was removed, and the residue was a pale yellow solid. The residue was dissolved with 30 mL each of water and ethyl acetate. The liquid was separated. The aqueous phase was extracted twice with ethyl acetate, 15 mL each time. The organic phases were combined, washed with water, and washed with saturated brine. Dry over anhydrous sodium sulfate, filter to remove sodium sulfate, the filtrate was distilled under reduced pressure to remove the solvent, the residue was sampled with 100-200 mesh silica gel, and separated by column chromatography (PE:EA=12:1 elution) to give a light yellow oil 4-((Indoline-5-)oxymethyl) benzaldehyde (4d-3, 0.72g, yield 71.29%) or 3-((Indoline-5-)oxymethyl) benzaldehyde (4d-4, 0.77g, yield 76.24%).
The synthetic route of 172078-33-0 has been constantly updated, and we look forward to future research findings.
Reference:
Patent; The Chinese People’s Liberation Army Military Academy Of Sciences Military Medical Institute; Wang Liyun; Tong Kun; Shi Weiguo; Cheng Jingchao; Yu Zixing; Ren Fengxia; Zhou Hu; Xiong Ying; (49 pag.)CN111217776; (2020); A;,
Indoline – Wikipedia,
Indoline | C8H9N – PubChem