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N,N′-Dioxide–scandium(III) complex catalyzed highly enantioselective Friedel–Crafts alkylation of indole to alkylidene malonates

Autor: Xin Zhou, Yanling Liu, Xiaohua Liu, Xiaoming Feng, Deju Shang

Publikováno v: Tetrahedron. 66:1447-1457

A highly efficient enantioselective Friedel–Crafts alkylation of indoles with alkylidene malonates has been developed using chiral N,N′-dioxide L4–scandium(III) complex as the catalyst, giving the corresponding products in high yields with exce

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::a9b8bde4f3e4a0bc122b3a5d5cceeb73
https://doi.org/10.1016/j.tet.2009.12.032

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AgAsF6/Sm(OTf)3 Promoted Reversal of Enantioselectivity for the Asymmetric Friedel−Crafts Alkylations of Indoles with β,γ-Unsaturated α-Ketoesters

Autor: Lili Lin, Xin Zhou, Yin Zhu, Yanling Liu, Xiaoming Feng, Xiaohua Liu, Deju Shang

Publikováno v: Organic Letters. 12:180-183

The first example of central metal controlled reversal of enantioselectivity in asymmetric Friedel-Crafts alkylation of indoles and beta,gamma-unsaturated alpha-ketoesters has been developed. Using the same chiral starting material derived N,N'-dioxi

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7dda1edfdccbea84a3a0f4b7b8f49fc9
https://doi.org/10.1021/ol902587t

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Highly Efficient Synthesis of Quaternary α-Hydroxy PhosphonatesviaLewis Acid-Catalyzed Hydrophosphonylation of Ketones

Autor: Xin Zhou, Yanling Liu, Xiaohua Liu, Lu Chang, Lili Lin, Jiannan Zhao, Deju Shang, Xiaoming Feng

Publikováno v: Advanced Synthesis & Catalysis. 351:2567-2572

A Lewis acid catalyst has been first applied to the hydrophosphonylation of ketones, giving the corresponding quaternary α-hydroxy phosphonates in high yields (up to 98%). The present method was highly tolerable for functionalized ketones. Moreover,

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::f18bbd63356552fc16966b55b4e08db0
https://doi.org/10.1002/adsc.200900531

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AN,N′-Dioxide-Copper(II) Complex as an Efficient Catalyst for the Enantioselective and Diastereoselective Mannich-Type Reaction of Glycine Schiff Bases with Aldimines

Autor: Xiaohua Liu, Xin Zhou, Yanling Liu, Xiaoming Feng, Deju Shang

Publikováno v: Chemistry - A European Journal. 15:3678-3681

Mild mannered! A highly diastereo- and enantioselective Mannich-type reaction of glycine Schiff base 1 has been developed by using the N,N'-dioxide L-Cu(II) complex as a catalyst. Various optically active anti-alpha,beta-diamino acid esters were obta

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d4e39b4cb01d99524ef990a76221a375
https://doi.org/10.1002/chem.200900118

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Enantioselective Three-Component Kabachnik−Fields Reaction Catalyzed by Chiral Scandium(III)−N,N′-Dioxide Complexes

Autor: Xiaohua Liu, Xiaoming Feng, Qi Zhang, Xin Zhou, Deju Shang, Lili Lin

Publikováno v: Organic Letters. 11:1401-1404

The N,N'-dioxide-Sc(III) complex has been applied in the three-component Kabachnik-Fields reaction of aldehydes, 2-aminophenol, and diphenyl phosphite, giving the corresponding alpha-amino phosphonates in good yields with high enantioselectivities (u

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c99955e6b6c78501049e9427d7a91ff2
https://doi.org/10.1021/ol9000813

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Enantioselective Friedel-Crafts Alkylation of Indoles with Alkylidene Malonates Catalyzed byN,N′-Dioxide-Scandium(III) Complexes: Asymmetric Synthesis ofβ-Carbolines

Autor: Xiaoming Feng, Xiaohua Liu, Deju Shang, Xin Zhou, Yanling Liu

Publikováno v: Chemistry - A European Journal. 15:2055-2058

An efficient catalytic asymmetric Friedel-Crafts alkylation of indoles with alkylidene malonates has been developed by using a chiral N,N'-dioxide-Sc(OTf)(3) complex as the catalyst (see scheme). Some optically active intermediates containing the ind

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f36d1275127af40bd21a5da0400d546d
https://doi.org/10.1002/chem.200802210

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Chiral N,N′-dioxide-iron(II) complexes catalyzed enantioselective oxa-Michael addition of α,β-unsaturated aldehydes

Autor: Lu Chang, Junguo Xin, Xiaohua Liu, Deju Shang, Xiaoming Feng

Publikováno v: Tetrahedron Letters. 49:6663-6666

The enantioselective oxa-Michael addition reaction of 1-(4-methoxyphenyl) ethanone oxime to various α,β-unsaturated aldehydes was accomplished by using chiral N , N ′-dioxide-FeSO 4 ·7H 2 O (1:1) complex. Aromatic acid was employed as additive t

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::ac24baeea979a2ab2fc9a260b880cf4e
https://doi.org/10.1016/j.tetlet.2008.09.041

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