Results 61 to 70 of about 62,467 (179)

Nickel-Catalyzed Heck Reaction

SynOpen, 2023
Pragya Gahlot, Kavita Mittal
doaj   +1 more source

Copper-catalyzed trifluoromethylation of alkenes with an electrophilic trifluoromethylating reagent

Beilstein Journal of Organic Chemistry, 2013
An efficient method for the copper-catalyzed trifluoromethylation of terminal alkenes with an electrophilic trifluoromethylating reagent has been developed. The reactions proceeded smoothly to give trifluoromethylated alkenes in good to excellent yields.
Xiao-Ping Wang, Jin-Hong Lin, Cheng-Pan Zhang, Ji-Chang Xiao, Xing Zheng   +4 more
doaj   +1 more source

Catálise assimétrica na ciclopropanação de olefinas Asymmetric catalysis in the cyclopropanation of olefins

Química Nova, 2007
The main methodologies in the asymmetric cyclopropanation of alkenes with emphasis on asymmetric catalysis are covered. Exemples are the Simmons-Smith reaction, the use of diazoalkanes and reactions carried out by decomposition of alpha-diazoesters in ...
Raquel A. C. Leão, Vítor F. Ferreira, Sergio Pinheiro   +2 more
doaj   +1 more source

Trisubstituted Alkenes as Valuable Building Blocks

Molecules
The stereoselective synthesis of trisubstituted alkenes has become a key topic in modern organic chemistry. At the same time, trisubstituted alkenes also serve as valuable starting materials for a wide range of transformations.
Tomáš Tobrman, Václav Hron
doaj   +1 more source

Alkenes from β-lithiooxyphosphonium ylides generated by trapping α-lithiated terminal epoxides with triphenylphosphine

Beilstein Journal of Organic Chemistry, 2012
Terminal epoxides undergo lithium 2,2,6,6-tetramethylpiperidide-induced α-lithiation and subsequent interception with Ph3P to provide a new and direct entry to β-lithiooxyphosphonium ylides.
David. M. Hodgson, Rosanne S. D. Persaud
doaj   +1 more source

The Azidofunctionalization of Alkenes

ChemistryEurope
The azidofunctionalization of alkenes has emerged as a powerful difunctionalization strategy, expanding the toolbox of synthetic chemistry. This transformation enables the simultaneous installation of an azide and a second functional group onto an alkene,
Pierre Palamini, Jerome Waser
doaj   +1 more source

Nickel-Catalyzed Three-Component 1,2-Carboacylation of Alkenes

Molecules
Ketones, prevalent in many biologically significant molecules, require the development of novel methods to synthesize these structures, which is a critical endeavor in organic synthesis. Transition metal catalysis has proven to be an effective method for
Shengzhou Jin, Lanfen Wang, Yinggang Jia, Wenbo Ma, Dingyi Wang   +4 more
doaj   +1 more source

Hydrobromination of alkenes with PBr3/SiO2: a simple and efficient regiospecific preparation of alkyl bromides

Journal of the Brazilian Chemical Society, 2001
The reaction of several alkenes with 0.4 mol equiv. PBr3/SiO2 in dichloromethane at room temperature gave the alkyl bromides with Markovnikov regiospecificity in 50 - 100% yield and short reaction time. Isoprene at - 8 °C in these conditions gave 1-bromo-
Sanseverino Antonio M., Mattos Marcio C.S. de   +1 more
doaj  

Cyclopropanation of unactivated alkenes with diazo compounds enables facile synthesis of challenging cyclopropanes and late-stage sesquiterpene modification. [PDF]

Chem Sci
Zhang L, Zhang N, Wang D, Yuan X, Han X, Zhuo M, Guo G, Zhang WD, Zhang H, Zhang Y.   +9 more
europepmc   +1 more source

Conversion of Alkenes Into Simple or Functionalized Aldehydes by Reaction With an Ambiphilic Masked Formyl Radical. [PDF]

Angew Chem Int Ed Engl
Lai SQ, Zhao PF, Wang ZS, Wang HC, Wang XJ, Zhu LY, Han B.   +6 more
europepmc   +1 more source