193810-79-6Relevant articles and documents
Elements of regiocontrol in palladium-catalyzed oxidative arene cross-coupling
Stuart, David R.,Villemure, Elisia,Fagnou, Keith
, p. 12072 - 12073 (2007)
By changing the stoichiometric oxidant and modifying the indole N-substituent in palladium-catalyzed oxidative arene cross-coupling reactions, both C2 and C3 oxidative indole arylation can be achieved in high yield. High regioselectivity can also be achieved with the benzene component, and the use of this methodology with pyrrole substrates is illustrated. A mechanistic hypothesis for the change in C2/C3 selectivity is advanced. Copyright
A systematic study of two complementary protocols allowing the general, mild and efficient deprotection of N-pivaloylindoles
Ruiz, Míriam,Sánchez, J. Domingo,López-Alvarado, Pilar,Menéndez, J. Carlos
experimental part, p. 705 - 710 (2012/01/06)
Two mild and general protocols for the high-yielding deprotection of indoles and related fused heterocyclic systems are described, involving either hydride transfer from LDA or hydrolysis by the DBU-water system. Both methods were shown to tolerate a wide variety of substituents and functional groups, but the hydrolytic one proved to be particularly general, being compatible with 2-alkyl substituents, aldehydes, ketones, carboxylic acids, halogens, ethers, amides and esters. Yields were normally excellent in both cases, but were usually slightly higher for the reductive method. Taken together, these two protocols provide a general solution to the problem of pivaloyindole deprotection.
Convenient synthesis of 2-substituted indoles from 2-ethynylanilines with tetrabutylammonium fluoride
Yasuhara, Akito,Kanamori, Yuichi,Kaneko, Masashi,Numata, Atsushi,Kondo, Yoshinori,Sakamoto, Takao
, p. 529 - 534 (2007/10/03)
The cyclization reaction of various 2-ethynylanilines, which were easily synthesized from 2-haloanilines by the palladium-catalyzed reaction with terminal alkynes, with tetrabutylammonium fluoride (TBAF) to yield 2-substituted indoles proceeded at refluxing or room temperature in THF in excellent yields without affecting the bromo, chloro, cyano, ethoxycarbonyl, and ethynyl groups.