نتایج جستجو برای: acetates salts

تعداد نتایج: 28651  

Journal: :The Journal of Physical Chemistry 1914

Journal: :Nippon kagaku zassi 1949

Journal: :Organic letters 2014
Fu-Zhong Han Fu-Lin Zhu Ya-Hui Wang Yuan Zou Xin-Hu Hu Song Chen Xiang-Ping Hu

A chiral tridentate ketimine P,N,N-ligand has been successfully applied in the copper-catalyzed enantioselective propargylic substitution of propargylic acetates with a variety of β-dicarbonyl compounds, in which excellent enantioselectivities (up to >99% ee) and high yields have been obtained.

Journal: :Chemical communications 2010
Pierrick Nun Sylvain Gaillard Alexandra M Z Slawin Steven P Nolan

The use of [(IPr)AuOH] permits the generation of gold(i)-amine complexes by a silver-free protocol. These in situ or well-defined complexes are used in a straightforward synthetic route to substituted allenes from propargylic acetates. The catalytic activity can be modulated as a function of the nature of the ligand bound to the gold-NHC moiety.

Journal: :Organic & biomolecular chemistry 2015
Tarun Kumar Deepti Verma Rubem F S Menna-Barreto Wagner O Valença Eufrânio N da Silva Júnior Irishi N N Namboothiri

A one-pot, two step synthesis of highly substituted imidazoles has been carried out in good to excellent yields for the first time via a cascade intermolecular aza-SN2'-intramolecular aza-Michael addition involving a variety of Morita-Baylis-Hillman acetates of nitroalkenes and amidines in the presence of DABCO at room temperature. The synthetic and biological utility of the products has been d...

Journal: :Organic & biomolecular chemistry 2008
Song Cao Jingjing Wu Lina Li Longjie Zhu Jian Zhang Jinlong Yu Xuhong Qian

An efficient three component one-pot method was developed to assemble 2-heteroaryl-2-aryl acetates via VNS(Ar)-S(N)Ar and VNS(Ar)-S(N) reaction by using N-methylpyrrolidone (NMP) as general solvent.

Journal: :Chemical communications 2007
Motoi Kawatsura Fumio Ata Shuichi Hayase Toshiyuki Itoh

In the RuCl2(p-cymene)/PPh3 catalysed regioselective allylic alkylation of monosubstituted allyl acetates with malonate anion, the selective substitution at the position originally substituted with acetate was observed.

Journal: :Organic letters 2012
Yu Liu Shengming Ma

A new and efficient approach to benzocycles from cyclopropene derivatives is described. Deprotection by organolithiums and subsequent ring-opening cyclization of the related 2-cyclopropenyl phenyl or benzyl acetates generated benzofurans and isochromenes in one pot.

Journal: :Chemical communications 2002
Jiang-Lin Liang Xiao-Qi Yu Chi-Ming Che

Chiral ruthenium(II)-salen complexes [RuII(salen)(PPh3)2] catalyse asymmetric aziridination of alkenes with up to 83% ees, asymmetric amidation of silyl enol ethers with up to 97% ees, and allylic amidation of cholesteryl acetates with good regioselectivity.

Journal: :Organic & biomolecular chemistry 2013
Mirim Kim Jihye Park Satyasheel Sharma Sangil Han Sang Hoon Han Jong Hwan Kwak Young Hoon Jung In Su Kim

Tandem rhodium-catalyzed oxidative allylation and annulation of acetanilides with allyl acetate to afford the corresponding indoles are described. In addition, the site-selective C2 allylation, crotylation and prenylation of indoles using allylic acetates under rhodium catalysis are reported.

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