ChemInform Abstract: Asymmetric Catalysis of Carbonyl-Ene and Aldol Reactions with Fluoral by Chiral Binaphthol-Derived Titanium Complex.

ChemInform ◽  
2010 ◽  
Vol 27 (15) ◽  
pp. no-no
Author(s):  
K. MIKAMI ◽  
T. YAJIMA ◽  
T. TAKASAKI ◽  
S. MATSUKAWA ◽  
M. TERADA ◽  
...  
Keyword(s):  
Asymmetric Catalysis ◽  
Aldol Reactions ◽  
Titanium Complex

Asymmetric catalysis of carbonyl-ene and aldol reactions with fluoral by chiral binaphthol-derived titanium complex

Tetrahedron ◽  
1996 ◽  
Vol 52 (1) ◽  
pp. 85-98 ◽  
Author(s):  
Koichi Mikami ◽  
Tomoko Yajima ◽  
Tsuyoshi Takasaki ◽  
Satoru Matsukawa ◽  
Masahiro Terada ◽  
...  
Keyword(s):  
Asymmetric Catalysis ◽  
Aldol Reactions ◽  
Titanium Complex

Highly Diastereoselective and Irreversible Aldol Reactions of N-Sulfonylimidates

Synthesis ◽  
2016 ◽  
Vol 48 (19) ◽  
pp. 3413-3419 ◽  
Author(s):  
Hannah Bartrum ◽  
Sébastien Carret ◽  
Jean-François Poisson
Keyword(s):  
Lewis Acid ◽  
High Yield ◽  
Aldol Reactions ◽  
Titanium Complex ◽  
Reaction Proceeds

A mild method for the aldolization of N-sulfonylimidates was developed. The reaction proceeds in excellent diastereoselectivity to provide a range of useful β-hydroxyimidates in high yield. The innate reversibility of the reaction is suppressed by the use of a titanium complex as a Lewis acid.

Asymmetric Catalysis of (Hetero) Diels-Alder Cycloadditions by a Modified Binaphthol-derived Titanium Complex

Synlett ◽  
1995 ◽  
Vol 1995 (09) ◽  
pp. 967-968 ◽  
Author(s):  
Yukihiro Motoyama ◽  
Masahiro Terada ◽  
Koichi Mikami
Keyword(s):  
Asymmetric Catalysis ◽  
Diels Alder ◽  
Titanium Complex

Asymmetric Catalysis of Diels-Alder Cycloaddition of 2-Alkenoyl Pyridine with Cyclopentadiene by Binaphthol-Titanium Complex

2009 ◽  
Vol 6 (5) ◽  
pp. 392-396 ◽  
Author(s):  
Li Wang ◽  
Ji Zhang ◽  
Na Wang ◽  
Xin-Bin Yang ◽  
Qin Wang ◽  
...  
Keyword(s):  
Asymmetric Catalysis ◽  
Diels Alder ◽  
Titanium Complex

ChemInform Abstract: Asymmetric Catalysis of Diels—Alder Cycloaddition of 2-Alkenoyl Pyridine with Cyclopentadiene by Binaphthol-Titanium Complex.

ChemInform ◽  
2009 ◽  
Vol 40 (50) ◽  
Author(s):  
Li Wang ◽  
Ji Zhang ◽  
Na Wang ◽  
Xin-Bin Yang ◽  
Qin Wang ◽  
...  
Keyword(s):  
Asymmetric Catalysis ◽  
Titanium Complex

scholarly journals Asymmetric Catalysis Special Feature Part II: Enantioselective direct aldol reactions catalyzed by L-prolinamide derivatives

2004 ◽  
Vol 101 (16) ◽  
pp. 5755-5760 ◽  
Author(s):  
Z. Tang ◽  
F. Jiang ◽  
X. Cui ◽  
L.-Z. Gong ◽  
A.-Q. Mi ◽  
...  
Keyword(s):  
Asymmetric Catalysis ◽  
Aldol Reactions

scholarly journals Kinetic Insights into Cyanosilylation of Aldehydes Catalyzed by a Covalently Bridged Dinuclear (Salen)titanium Complex

2020 ◽  
Author(s):  
Zhipeng Zhang ◽  
Zheng Wang ◽  
Kuiling Ding
Keyword(s):  
Asymmetric Catalysis ◽  
Catalytic System ◽  
Catalytic Mechanism ◽  
Organic Reactions ◽  
Kinetic Investigation ◽  
Chiral Catalysts ◽  
Titanium Complex ◽  
Trimethylsilyl Cyanide ◽  
First Order ◽  
Dual Activation

Enantioselective addition of trimethylsilyl cyanide (TMSCN) to aldehydes is one of the most extensively studied organic reactions in asymmetric catalysis. Herein, we report our intensive kinetic investigation on the asymmetric addition of TMSCN to benzaldehyde, catalyzed by a covalently bridged dinuclear (salen)titanium complex <b>2</b>, which has been one of the most efficient artificial chiral catalysts reported so far for this reaction. It was found that the method of initial rates for kinetic investigation is not appropriate in this case because of the presence of a significant <a></a><a>incubation </a>period in the catalysis, while the method of progress rates proved to be more reliable and efficient for judging the kinetic orders of this catalytic system. The kinetic results revealed that <a>the reaction follows first order with respect to the catalyst</a> and is nearly independent of concentrations of both benzaldehyde and TMSCN<a>. A detailed catalytic mechanism for cyanosilylation of benzaldehyde in the presence of <b>2</b> was proposed, wherein the key active dinuclear species works in a cooperative manner for dual activation of both reactants.</a>

Design, Synthesis and Use of Novel 3,3′-Disubstituted 2,2′-Bipyridine-Based Chiral Ligands: Asymmetric Catalysis in Direct Aldol Reactions

Synlett ◽  
2012 ◽  
Vol 23 (13) ◽  
pp. 1990-1994 ◽  
Author(s):  
Hong-Wu Zhao ◽  
Hai-Long Li ◽  
Yuan-Yuan Yue ◽  
Xiao Qin ◽  
Zhi-Hui Sheng ◽  
...  
Keyword(s):  
Asymmetric Catalysis ◽  
Chiral Ligands ◽  
Aldol Reactions ◽  
Design Synthesis
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