405873-05-4Relevant academic research and scientific papers
Highly stereoselective imidazolethiones mediated Friedel-Crafts alkylation of indole derivatives
Liang, Xianrui,Li, Shuangmin,Su, Weike
supporting information; experimental part, p. 289 - 291 (2012/01/31)
The asymmetric Friedel-Crafts alkylation of indoles with α,β-unsaturated aldehydes was promoted by the novel imidazolethiones to afford the corresponding adducts in moderate to excellent yields and high enantioselectivities under mild reaction conditions.
Enantioselective Friedel-Crafts alkylations catalysed by well-defined iridium and rhodium half-sandwich complexes
Carmona, Daniel,Lamata, Maria Pilar,Sanchez, Antonio,Viguri, Fernando,Oro, Luis A.
experimental part, p. 893 - 906 (2011/08/21)
Aqua-complexes (SM,RC)-[CpM{(R)-prophos}(H 2O)][SbF6]2 (M = Rh 1, Ir 2) catalysed the alkylation of α,β-unsaturated aldehydes with aromatics and heteroaromatics but in some cases, mixtures of products
CaSH organocatalysis: Enantioselective Friedel-Crafts alkylation of indoles with α,β-unsaturated aldehydes
Tian, Tian,Pei, Bao-Jian,Li, Qing-Hua,He, Hao,Chen, Ling-Yan,Zhou, Xiang,Chan, Wing-Hong,Lee, Albert W. M.
experimental part, p. 2115 - 2118 (2011/03/22)
Enantioselective Friedel-Crafts alkylation of indole with α,β-unsaturated aldehyde was catalyzed by camphor sulfonyl hydrazine (CaSH) with good enantioselectivity (81-88%). Georg Thieme Verlag Stuttgart.
Enantioselective friedel-crafts alkylations catalyzed by bis(oxazolinyl)pyridine-scandium(III) triflate complexes
Evans, David A.,Fandrick, Keith R.,Song, Hyun-Ji,Scheidt, Karl A.,Xu, Risheng
, p. 10029 - 10041 (2008/03/12)
The enantioselective Friedel-Crafts addition of a variety of indoles catalyzed by bis(oxazolinyl)pyridine-scandium(III) triflate complexes (Sc(III)-pybox) was accomplished utilizing a series of β-substituted α,β-unsaturated phosphonates and α,β-unsaturate
Intra- and intermolecular reactions of indoles with alkynes catalyzed by gold
Ferrer, Catalina,Amijs, Catelijne H. M.,Echavarren, Antonio M.
, p. 1358 - 1373 (2008/02/04)
Indoles react intramolecularly with alkynes in the presence of gold catalysts to give from six- to eight-membered-ring annulated compounds. The cationic AuI complex [Au(P{C6H4-(o-Ph))(tBu) 2)(NCMe)]SbF6 is the best catalyst for the formation of six- and seven-membered rings by 6-endo-dig, 6-exo-dig, and 7-exo-dig cyclizations. Indoloazocines are selectively obtained with AuCl3 as catalyst in a rare 8-endodig process. In this process alienes or tetracyclic annulated derivatives are also formed as a result of an initial fragmentation reaction. The intermolecular reaction of indoles with alkynes proceeds to form 3-alkenylated intermediates that react with a second equivalent of indole to give bisindolyl derivatives. Indoles that are substituted at the 3-position react intermolecularly with alkynes to give 2-alkenylated intermediates that can be trapped intramolecularly with the appropriate nucleophiles.
Enantioselective Friedel-Crafts alkylations of α,β-unsaturated 2-acyl imidazoles catalyzed by bis(oxazolinyl)pyridine-scandium(III) triflate complexes
Evans, David A.,Fandrick, Keith R.,Song, Hyun-Ji
, p. 8942 - 8943 (2007/10/03)
An enantioselective Friedel-Crafts alkylation with α,β-unsaturated 2-acyl imidazoles and electron-rich aromatic nucleophiles catalyzed by bis(oxazolinyl)pyridine-scandium(III) triflate complexes has been accomplished. These α,β-unsaturated 2-acyl imidazol
Enantioselective transformation of alpha, beta-unsaturated aldehydes using chiral organic catalysts
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, (2008/06/13)
Nonmetallic organic catalysts are provided that facilitate the enantioselective reaction of α,β-unsaturated aldehydes. The catalysts are chiral imidazolidinone compounds having the structure of formula (IIA) or (IIB) or are acid addition salts thereof, wherein, in one preferred embodiment, R1 is C1-C6 alkyl, R2 is tri(C1-C6 alkyl)-substituted methyl, R3 and R4 are hydrogen, and R5 is phenyl optionally substituted with 1 or 2 substituents selected from the group consisting of halo, hydroxyl, and C1-C6 alkyl. The chiral imidazolidinones are useful in catalyzing a wide variety of reactions, including cycloaddition reactions, Friedel-Crafts alkylation reactions, and Michael additions.
Enantioselective organocatalytic indole alkylations. Design of a new and highly effective chiral amine for iminium catalysis
Austin, Joel F.,MacMillan, David W. C.
, p. 1172 - 1173 (2007/10/03)
The indole framework has become widely identified as a "privileged" structure with representation in over 3000 natural isolates and 40 medicinal agents of diverse therapeutic action. A new strategy for asymmetric access to this important pharmacaphore has
