Carbon-carbon double-bond formation in the intermolecular acetonitrile reductive coupling promoted by a mononuclear titanium(II) compound. Preparation and characterization of two titanium(IV) imido derivatives

The carbon–carbon double bond formation via neodymium-mediated Barbier-type reaction of ketones and allyl halides in the presence of diethyl phosphite is reported for the first time. The reaction is highly α-regioselective and was conveniently carried out under mild conditions in a one-pot fashion. From a synthetic point of view, a series of conjugated alkenes were obtained in moderate to good yields in this one-pot reaction with feasible reaction conditions.

Download Full-text

The Characterization of Chitosan Nanoparticles by Raman Spectroscopy

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.665.367 ◽

2014 ◽

Vol 665 ◽

pp. 367-370 ◽

Cited By ~ 10

Author(s):

Xiao Dan Ren ◽

Qing Shan Liu ◽

Hui Feng ◽

Xiao Ying Yin

Keyword(s):

Raman Spectroscopy ◽

Double Bond ◽

Chitosan Nanoparticles ◽

Carbon Double Bond

To study the performance of chitosan nanoparticles systematically, we characterized MMA, chitosan and synthesized chitosan nanoparticles by Raman spectroscopy. Through analyzing the characteristic peaks of each substance, we found MMA grafted chitosan by opening its carbon-carbon double bond. So Raman spectroscopy is a very effective way in terms of the characterization of nanomaterials .

Download Full-text

ChemInform Abstract: Titanium-Mediated Direct Carbon-Carbon Double Bond Formation to α-Trifluoromethyl Acids: A New Contribution to the Knoevenagel Reaction and a High-Yielding and Stereoselective Synthesis of α-Trifluoromethylacrylic Acids.

ChemInform ◽

10.1002/chin.201216072 ◽

2012 ◽

Vol 43 (16) ◽

pp. no-no

Author(s):

Yanmei Liu ◽

Hua Lai ◽

Bo Rong ◽

Tie Zhou ◽

Jia Hong ◽

...

Keyword(s):

Double Bond ◽

Stereoselective Synthesis ◽

Bond Formation ◽

Knoevenagel Reaction ◽

Carbon Double Bond

Download Full-text

ChemInform Abstract: Carbon-Carbon Double-Bond Formation from the Reaction of Organozinc Reagents with Aldehydes Catalyzed by a Nickel(II) Complex.

ChemInform ◽

10.1002/chin.200248057 ◽

2010 ◽

Vol 33 (48) ◽

pp. no-no

Author(s):

Jin-Xian Wang ◽

Ying Fu ◽

Yulai Hu

Keyword(s):

Double Bond ◽

Bond Formation ◽

Carbon Double Bond ◽

Organozinc Reagents

Download Full-text

Silyl-substituted α,β-Unsaturated Ketones from the Reaction of Silylvinylmetallic Reagents with Acid Anhydrides

Canadian Journal of Chemistry ◽

10.1139/v73-302 ◽

1973 ◽

Vol 51 (12) ◽

pp. 2024-2032 ◽

Cited By ~ 35

Author(s):

A. G. Brook ◽

J. M. Duff

Keyword(s):

Double Bond ◽

Low Temperatures ◽

Silyl Group ◽

Unsaturated Ketones ◽

Carbon Double Bond ◽

Benzoic Anhydride ◽

Acid Anhydrides ◽

By Products

The reactions of a series of silyl-substituted vinylmetallic reagents with acetic and benzoic anhydride have been investigated as a general route to α,β-unsaturated ketones having a silyl group attached to the carbon–carbon double bond. The reaction has been found to be generally applicable for acetyl derivatives provided low temperatures are used but the reaction with benzoic anhydride gives poorer results. The i.r. and u.v. spectra of the ketones are discussed. The characterization of novel 1,4-dienes obtained as by-products in the syntheses is also described.

Download Full-text