Reference of 7699-18-5, A common heterocyclic compound, 7699-18-5, name is 5-Methoxyindolin-2-one, molecular formula is C9H9NO2, 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.
General procedure: The appropriate compound 2 (10 mmol) was dissolved inmethanol (100 mL) and treated with the equivalent of the appropriatealdehyde 1 and piperidine (1 mL). For compounds 39, 41 and42 the yield was much lower (5%), and an improvement (15-20%)was obtained by replacing piperidine with 33% NH4OHThe reaction mixture was refluxed for 5-10 h, except for compounds39-42 which required a longer reflux time (16-24 h; theprogress of the reaction was followed by TLC). The precipitate,formed on cooling, was collected by filtration.Compounds 39e41 were purified by column chromatographywith petroleum ether/acetone as the eluent. Most of the crudeproducts were crystallized from methanol, except 27 (acetone/petroleumether), 34, 43-48, 50-52 (ethanol) and 42, 49 (toluene). Inthe case of compound 10, the two E/Z isomers were isolated byfractional crystallization from methanol.
The basis of chemical reaction formula synthesis, the synthesis route is composed of some specific reactions and combined according to certain logical thinking. We look forward to the emergence of more reaction modes in the future.
Reference:
Article; Morigi, Rita; Locatelli, Alessandra; Leoni, Alberto; Rambaldi, Mirella; Bortolozzi, Roberta; Mattiuzzo, Elena; Ronca, Roberto; Maccarinelli, Federica; Hamel, Ernest; Bai, Ruoli; Brancale, Andrea; Viola, Giampietro; European Journal of Medicinal Chemistry; vol. 166; (2019); p. 514 – 530;,
Indoline – Wikipedia,
Indoline | C8H9N – PubChem