ChemInform Abstract: Recyclable BINOL-Quinine-Squaramide as a Highly Efficient Organocatalyst for α-Amination of 1,3-Dicarbonyl Compounds and α-Cyanoacetates.

ChemInform ◽  
2015 ◽  
Vol 46 (31) ◽  
pp. no-no
Author(s):  
Yongzhi Gao ◽  
Bin Liu ◽  
Hai-Bing Zhou ◽  
Wei Wang ◽  
Chune Dong
Keyword(s):  
Dicarbonyl Compounds ◽  
Highly Efficient

Recyclable BINOL–quinine–squaramide as a highly efficient organocatalyst for α-amination of 1,3-dicarbonyl compounds and α-cyanoacetates

RSC Advances ◽  
2015 ◽  
Vol 5 (31) ◽  
pp. 24392-24398 ◽  
Author(s):  
Yongzhi Gao ◽  
Bin Liu ◽  
Hai-Bing Zhou ◽  
Wei Wang ◽  
Chune Dong
Keyword(s):  
Amino Acid ◽  
Dicarbonyl Compounds ◽  
Highly Efficient ◽  
Amino Acid Precursors

An efficient organocatalytic asymmetric α-amination of 1,3-dicarbonyl and α-cyanoacetates compounds towards chiral α-amino acid precursors is reported.

ChemInform Abstract: Heteropoly Acid Catalyzed Highly Efficient Alkylation of 1,3-Dicarbonyl Compounds with Benzylic and Propargylic Alcohols.

ChemInform ◽  
2008 ◽  
Vol 39 (41) ◽  
Author(s):  
J. S. Yadav ◽  
B. V. Subba Reddy ◽  
T. Pandurangam ◽  
K. V. Raghavendra Rao ◽  
K. Praneeth ◽  
...  
Keyword(s):  
Heteropoly Acid ◽  
Dicarbonyl Compounds ◽  
Propargylic Alcohols ◽  
Highly Efficient ◽  
Acid Catalyzed

A Highly Efficient Heterogeneous Copper-Catalyzed Oxidative Cyclization of Benzylamines and 1,3-Dicarbonyl Compounds To Give Trisubstituted Oxazoles

Synthesis ◽  
2019 ◽  
Vol 51 (16) ◽  
pp. 3091-3100
Author(s):  
Li Wei ◽  
Shengyong You ◽  
Yuxin Tuo ◽  
Mingzhong Cai
Keyword(s):  
Copper Catalyst ◽  
Oxidative Cyclization ◽  
Dicarbonyl Compounds ◽  
Mild Conditions ◽  
Highly Efficient ◽  
Intermolecular Cyclization ◽  
Step Procedure ◽  
Mcm 41

The heterogeneous copper-catalyzed cascade oxidative cyclization between benzylamines and 1,3-dicarbonyl compounds was achieved by using the 3-(2-aminoethylamino)propyl-functionalized MCM-41-immobilized copper(II) complex [MCM-41-2N-Cu(OAc)2] as catalyst and t-BuOOH (TBHP) as oxidant, with iodine as additive, under mild conditions, yielding a wide variety of 2,4,5-trisubstituted oxazoles in mostly good to excellent yields. This heterogeneous copper catalyst can be facilely prepared via a simple two-step procedure from readily available and inexpensive reagents and exhibits a slightly higher activity than Cu(OAc)2. MCM-41-2N-Cu(OAc)2 is also easy to recover and can be recycled up to eight times with almost consistent activity. The reaction is the first example of heterogeneous copper-catalyzed intermolecular cyclization for the construction of polysubstituted oxazoles.

Catalytic asymmetric α-amination of β-keto esters and β-keto amides with a chiral N,N′-dioxide–copper(i) complex

2016 ◽  
Vol 3 (7) ◽  
pp. 809-812 ◽  
Author(s):  
Xiao Xiao ◽  
Lili Lin ◽  
Xiangjin Lian ◽  
Xiaohua Liu ◽  
Xiaoming Feng
Keyword(s):  
Reaction Conditions ◽  
Dicarbonyl Compounds ◽  
Keto Esters ◽  
Highly Efficient ◽  
Catalytic Asymmetric

The highly efficient asymmetric α-amination of β-keto esters and β-keto amides was realized by using a chiral N,N′-dioxide/Cu(i) complex. Under mild reaction conditions, a series of chiral α-amino dicarbonyl compounds were obtained in good result.

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