22837-11-2Relevant academic research and scientific papers
Palladium- and nickel-catalyzed kumada cross-coupling reactions of gem -difluoroalkenes and monofluoroalkenes with Grignard reagents
Dai, Wenpeng,Xiao, Juan,Jin, Guanyi,Wu, Jingjing,Cao, Song
, p. 10537 - 10546 (2015/02/19)
A novel Kumada-Tamao-Corriu cross-coupling reaction of gem-di- or monofluoroalkenes with Grignard reagents, with or without β-hydrogen atoms, in the presence of a catalytic amount of palladium- or nickel-based catalysts has been developed. The reaction is performed under mild conditions (room temperature or reflux in diethyl ether for 1-2 h) and leads to di-cross- or mono-cross-coupled products in good to high yields.
Direct arylation of alkenes with aryl iodides/bromides through an organocatalytic radical process
Sun, Chang-Liang,Gu, Yi-Fan,Wang, Bin,Shi, Zhang-Jie
supporting information; experimental part, p. 10844 - 10847 (2011/10/31)
A radical addition: A KOtBu-complex-promoted radical arylation of polysubstituted alkenes with aryl iodides/bromides proceeds in high efficiency (see scheme). Benzofuran derivatives are also produced starting from readily available allyl 2-iodophenyl ethers. Copyright
Nickel-catalyzed cross-coupling reaction of alkenyl methyl ethers with aryl boronic esters
Shimasaki, Toshiaki,Konno, Yuko,Tobisu, Mamoru,Chatani, Naoto
supporting information; experimental part, p. 4890 - 4892 (2010/01/06)
The Ni(0)-catalyzed cross-coupling of alkenyl methyl ethers with boronic esters is described. Several types of alkenyl methyl ethers can be coupled with a wide range of boronic esters to give the stilbene derivatives.
Modern Friedel-Crafts Chemistry. Part-XVII. Studies on the Acid-catalysed Dehydration of 3-(α-Naphthylmethyl)-3-pentanol, 2-(α-Naphthyl)-1,1-diphenyl-1-ethanol and 2-Methyl-2-(α-naphthyl)-2-butanol
Khalaf, Ali Ali,Makki, Mohamad S. I. Tawfik,Kaddah, Ahmed M.
, p. 260 - 264 (2007/10/02)
The title α-napthylalkanols were prepared by unequivocal methods and their dehydration patter was examined in the presence of both Lewis and Broensted-Lowry acid-catalysts. 3-(α-Naphthylmethyl)-3-pentanol (5) gave acyclidehydration mixture of 1,1-diethylacenaphthene (10, mainly) and 2-ethyl-1-methyl-2,3-dihydrophenalene (11) with AlCl3/CH3NO2 and an acyclidehydration mixture of 2-methyl-1-(α-naphthyl)-1-butene (12) and Z- and E-3-(α-naphthylmethyl)-2-pentene (13) with 85percent H2SO4, PPA or NaHSO4. 2-(α-Naphthyl)-1,1-diphenyl-1-ethanol (6) gave 1-(α-naphthyl)-2,2-diphenylethene (16) with H2SO4, PPA, NaHSO4 but a different unidentified product with AlCl3/CH3NO2.Finally, 3-methyl-2-(α-naphthyl)-2-butanol (7) gave 1,1,2-trimethyl-acenaphthene (18) with AlCl3/CH3NO2 but 2-methyl-3-(α-naphthyl)-2-butene (19) with 85percent H2SO4 or NaHSO4.Both reactants and products were characterised by elemental, spectral, chemical and glpc analysis.Mechanistic interpretations have been given in terms of carbocation reactions and rearrangements.
PHOSPHORORGANISCHE VERBINDUNGEN 120. VERSUCHE ZUM NACHWEIS VON "PHOSPHENEN" AUS GEEIGNETEN PHOSPHINSAEUREDERIVATEN DURCH ELIMINIERUNG
Weidert, Peter J.,Geyer, Ekkehard,Horner, Leopold
, p. 55 - 60 (2007/10/02)
Phosphinicacidhalogenides with the structure C are reacted with strong bases in the presence of carbonylcompounds.The eventually as intermediates formed "phosphenes" lead with carbonyl compounds to olefines following the course of the "PO-activated olefination".The intermediates don't react with olefines (stilbene or cyclopentadiene) to an isolable adduct.Key words: Phosphinicacidhalides; phosphenes as intermediates; PO-activated olefination; synthesis of olefines.
