- Enhancing thermal stability in aminopyridine iron(II)-catalyzed polymerization of conjugated dienes
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A library of well-defined aminopyridine iron(II) precatalysts with a tertiary amine moiety have been prepared and serve as highly efficient precatalysts for polymerization of isoprene and other biobased conjugated dienes, delivering the corresponding poly
- Jing, Chuyang,Wang, Liang,Zhu, Guangqian,Hou, Hongbin,Zhou, Li,Wang, Qinggang
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Read Online
- Scalable synthesis of secondary and tertiary amines by heterogeneous Pt-Sn/γ-Al2O3catalyzed N-alkylation of amines with alcohols
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Synthesis of secondary and tertiary amines has been efficiently realized from the N-alkylation of amines with alcohols by means of heterogeneous bimetallic Pt-Sn/γ-Al2O3catalyst (0.5?wt % Pt, molar ratio Pt:Sn?=?1:3) through a borrowing hydrogen strategy. The Pt-Sn/γ-Al2O3catalyst has exhibited very high catalytic activity towards a wide range of amines and alcohols, and can be conveniently recycled without Pt metal leaching. The present protocol was applied for the synthesis of N-phenylbenzylamine in 96% isolated yield from aniline and benzyl alcohol on a 2.1?kg scale of the substrates, demonstrating its potential applicability for higher-order amine synthesis.
- Wu, Kaikai,He, Wei,Sun, Chenglin,Yu, Zhengkun
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supporting information
p. 8516 - 8521
(2016/11/28)
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- Cobalt carbonyl-based catalyst for hydrosilylation of carboxamides
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The cobalt carbonyl [Co2(CO)8] complex is employed as a useful catalyst for the reduction of tertiary amides to the corresponding tertiary amines using 1,1,3,3-tetramethyldisiloxane (TMDS) and poly(methylhydrosiloxane) (PMHS) as silane reagents under thermal (100 °C) or photo-assisted conditions (UV, 350 nm at room temperature). Of particular interest, a low catalytic amount (0.5 mol%) of [Co2(CO)8] is used to perform the reaction with 2.2 equiv. of PMHS at 100 °C for 3 h. This reaction is the first example of a cobalt-catalyzed hydrosilylation of amides. Copyright
- Dombray, Thomas,Helleu, Camille,Darcel, Christophe,Sortais, Jean-Baptiste
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supporting information
p. 3358 - 3362
(2013/12/04)
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- One-pot reductive n-alkylation with carbonyl compounds to give tertiary amines via borane reduction of imines
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One-pot synthesis of tertiary amines via borane-mediated reduction of imines and reductive N-alkylation with carbonyl compounds is described. This protocols reducing agent is only borane in the reduction of imines, and additional reductant is not necessary in reductive N-alkylation step. When using more than two equivalents of aldehydes, reductive N-alkylation proceeded in good yield.
- Tokizane, Masashi,Sato, Kaori,Sakami, Yuki,Imori, Yoichiro,Matsuo, Chika,Ohta, Tetsuo,Ito, Yoshihiko
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experimental part
p. 36 - 42
(2010/05/02)
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- Effects of a side chain aromatic ring on the reactivity of copper(I) complexes with dioxygen
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Stabilization of the bis(μ-oxo)dicopper(III) intermediate is achieved by using a bidentate N-donor ligand with pendent indole rings: N,N-bis[(3-indolyl)methyl]N-[(2′-pyridyl)methyl]amine (BIP). The intermediate decomposes to give products arising from N-dealkylation and a product with a spiro ring composed of two indole rings (see scheme). This latter product probably results from a radical-coupling reaction.
- Shimazaki, Yuichi,Nogami, Takeo,Tani, Fumito,Odani, Akira,Yamauchi, Osamu
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p. 3859 - 3862
(2007/10/03)
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