76149-15-0Relevant academic research and scientific papers
Synthesis of 2-Oxindoles from Substituted Indoles by Hypervalent-Iodine Oxidation
Jiang, Xinpeng,Zheng, Cong,Lei, Lijun,Lin, Kai,Yu, Chuanming
, p. 1437 - 1442 (2018/04/06)
A practical conversion of indoles into the corresponding 2-oxindoles is achieved efficiently using a hypervalent iodine reagent. This oxidation is amenable to different substituted indoles, and allows the synthesis of a wide range of synthetically valuable substituted 2-oxindoles in up to 90 % yield. Furthermore, Ropinirole, a drug used to alleviate the symptoms of Parkinson's disease, was synthesized in three steps in an overall yield of 44 % using this method.
The development of a short route to the API ropinirole hydrochloride
Yousuf, Zeshan,Richards, Andrew K.,Dwyer, Andrew N.,Linclau, Bruno,Harrowven, David C.
, p. 10532 - 10539 (2015/11/10)
A four-step, three-stage synthesis of the API ropinirole hydrochloride has been developed from a commercially available naphthalene derivative. The new route has half the step-count and twice the overall yield of the current manufacturing process. Key features of the synthesis are a regioselective Birch reduction and an ozonolysis with concomitant ring closure to induce the required ring contraction.
PROCESS FOR THE PREPARATION OF ROPINIROLE
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Page/Page column 5, (2008/06/13)
A new process for the preparation of Ropinirole (1) and pharmaceutically acceptable hydrochloride salt thereof comprising reacting the compound V with nitromethane to obtain the compound of formula 11, which is reduced to compound III and alkylated to obtain compound IV. The oxidation of the indole ring provides the compound of formula (I).
Preparation of alkyl-substituted indoles in the benzene portion. Part 5. Efficient preparative procedure for 4-substituted indole derivatives
Fuji,Muratake,Natsume
, p. 2338 - 2343 (2007/10/02)
An effective and short synthetic method for 4-substituted indole derivatives was developed based on the two sequential reactions, i.e. nucleophilic addition of carbanions to common precursor molecules, 3-(1,3-dioxolan-2-yl)-1-[1(phenylsulfonyl)- and 1-[(4
Synthesis of N-Alkyl Derivatives of 4-(2'-Aminoethyl)indole
Cannon, Joseph G.,Demopoulos, Basil J.
, p. 1195 - 1199 (2007/10/02)
N-Substituted 4-(2'-aminoethyl)indoles are attainable in good yields from indole-4-acetic acid (2).Several methods of preparation for 2 were tried or considered.A new sequence involving Arndt-Eistert homologation of indole-4-carboxylic acid has been devis
