497179-39-2Relevant articles and documents
Reductive aromatization of oxindoles to 3-substituted indoles
Mandal, Tirtha,Chakraborti, Gargi,Dash, Jyotirmayee
supporting information, (2020/06/21)
A practical and scalable approach for the synthesis of 3-substituted indoles is delineated via hydride nucleophilic addition to 3-substituted-2-oxindoles. The reaction proceeds through reductive aromatization involving indolinium ion intermediate. A wide range of 3-functionalized indoles have been synthesized. The method is employed for the synthesis of 3,3?-bis-indoles and a dimeric 3-indole derivative. Moreover, this protocol is used to obtain naturally occuring amino acid tryptamine.
Highly diastereoselective oxa-[3+3] cyclization with C,N-cyclic azomethine imines: Via the copper-catalyzed aerobic oxygenated CC bond of indoles
Yu, Lemao,Zhong, Yuan,Yu, Jicong,Gan, Lu,Cai, Zhengjun,Wang, Rui,Jiang, Xianxing
supporting information, p. 2353 - 2356 (2018/03/09)
Herein, a copper-catalyzed highly diastereoselective aerobic oxygenated [3+3] cyclization of 3-substituted indoles with C,N-cyclic azomethine imines using oxygen as the sole oxidant under mild conditions has been developed. This protocol provides a simple and convenient approach for constructing [2,3]-fused indoline O-heterocycles bearing two pharmaceutically intriguing parts, tetrahydroisoquinoline and indoline. Good yields and excellent diastereoselectivity under mild reaction conditions were observed.
Catalytic diastereo- and enantioselective annulations between transient nitrosoalkenes and indoles
Zhang, Yu,Stephens, David,Hernandez, Graciela,Mendoza, Rosalinda,Larionov, Oleg V.
supporting information, p. 16612 - 16615 (2013/03/14)
Caught in transition: An efficient catalytic system is the key to the successful development of the first highly diastereo- and enantioselective annulation reaction between indoles and transient nitrosoalkenes. This robust reaction affords structurally unique architectures with up to three new chiral centers. The products can be readily elaborated into other indoline-based chiral heterocyclic motifs, including those of pyrrolidinoindoline alkaloids. Copyright