7206-16-8Relevant academic research and scientific papers
A General and Stereospecific Synthesis of Trans Alkenes and Regiospecific Synthesis of Ketones via Stepwise Hydroboration
Brown, Herbert C.,Basavaiah, D.,Kulkarni, Surendra U.
, p. 3808 - 3810 (1982)
The hydroboration of 1-bromo-1-alkynes with alkylbromoboranes (RBHBr*SMe2), conveniently obtained via the controlled hydridation of alkyldibromoboranes (RBBr2*SMe2), followed by treatment with sodium methoxide produces B-(trans-1-alkyl-1-alkenyl)boronate esters that provide the corresponding trans alkenes on protonolysis and ketones on oxidation
Single-Electron-Transfer-Induced Coupling of Alkylzinc Reagents with Aryl Iodides
Okura, Keisho,Shirakawa, Eiji
supporting information, p. 3043 - 3046 (2016/07/14)
Alkylzinc reagents prepared from an alkyllithium and zinc iodide were found to undergo coupling with aryl and alkenyl iodides in the presence of LiI in a mixed solvent consisting of THF and diglyme (1:1). Alkyllithiums, prepared by halogen–lithium exchange between an alkyl iodide and tert-butyllithium, are also converted to alkylarenes through alkylzinc reagents.
Stereoretentive Pd-catalyzed kumada-corriu couplings of alkenyl halides at room temperature
Krasovskiy, Arkady L.,Haley, Stephen,Voigtritter, Karl,Lipshutz, Bruce H.
, p. 4066 - 4069 (2014/10/15)
Stereoselective palladium-catalyzed Kumada-Corriu reactions of functionalized alkenyl halides and a variety of Grignard reagents, including those bearing β-hydrogen atoms and sensitive functional groups, can be carried out at room temperature using a new combination of reagents.
Iron thiolate complexes: Efficient catalysts for coupling alkenyl halides with alkyl grignard reagents
Cahiez, Gerard,Gager, Olivier,Buendia, Julien,Patinote, Cindy
supporting information; experimental part, p. 5860 - 5863 (2012/07/01)
Ironing out the kinks: Efficient new catalytic systems based on iron thiolates are described for the iron-catalyzed cross-coupling of alkyl Grignard reagents with alkenyl halides (see scheme). The reaction is highly chemo- and stereoselective. With this new procedure, the use of N-methylpyrrolidone as a co-solvent is no longer required. Copyright
Nickel-catalyzed cross-coupling reactions of alkyl aryl sulfides and alkenyl alkyl sulfides with alkyl grignard reagents using (Z)-3,3-dimethyl-1,2- bis(diphenylphosphino)but-1-ene as ligand
Kanemura, Shigenari,Kondoh, Azusa,Yorimitsu, Hideki,Oshima, Koichiro
scheme or table, p. 2659 - 2664 (2009/04/05)
A combination of nickel(II) acetylacetonate and (Z)-3,3-dimethyl-1,2- bis(diphenylphosphino)but-1-ene catalyzes cross-coupling reactions of alkyl aryl sulfides and alkenyl alkyl sulfides with alkyl Grignard reagents. Not only primary but also secondary alkyl Grignard reagents can be employed. Georg Thieme Verlag Stuttgart.
Alkynylsilanes as convenient precursors for the stereoselective synthesis of (E)-disubstituted alkenes
Zhao, Hong,Cai, Mingzhong
, p. 608 - 610 (2007/10/03)
Hydromagnesiation of alkynylsilanes 1 gives (Z)-α-silylvinyl Grignard reagents 2, which are reacted with alkyl iodides or aryl iodides in the presence of Cul or Pd(PPh3)4 catalysts to afford (Z)-1,2-disubstituted vinylsilanes 3 in good yields. Intermediates 3 can undergo a desilylation reaction to give (E)-disubstituted alkenes 4 in high yields.
Synthesis of trisubstituted and tetrasubstituted alkenes via a manganate-induced migration-elimination process
Kakiya, Hirotada,Shinokubo, Hiroshi,Oshima, Koichiro
, p. 10063 - 10069 (2007/10/03)
Preparation of alkenes via a manganate-induced alkylation-elimination sequence was investigated. The reaction of 2-alkoxy-1,1-dibromoalkanes with trialkylmanganates afforded disubstituted or trisubstituted alkenes. Treatment of 2-alkoxy-1,1,1-tribromoalkanes with trialkylmanganates provided trisubstituted or tetrasubstituted alkenes through bromine-metal exchange, transfer of two alkyl groups from manganese to carbon, and successive elimination of metal and the β-alkoxy moieties.
Cobalt-catalyzed alkenylation of zinc organometallics
Avedissian, Hovsep,Berillon, Laurent,Cahiez, Gerard,Knochel, Paul
, p. 6163 - 6166 (2007/10/03)
Organozinc halides and diorganozincs undergo cross-coupling reactions with either E- or Z-alkenyl iodides in the presence of catalytic amounts of Co(acac)2 or Co(acac)3 in THF:NMP at 55°C leading to polyfunctional alkenes with retent
Highly stereo and chemoselective iron-catalyzed alkenylation of organomagnesium compounds
Cahiez, Gerard,Avedissian, Hovsep
, p. 1199 - 1205 (2007/10/03)
In the presence of Fe(acac)3, Grignard reagents react readily with alkenyl halides (X = I, Br or Cl) in a THF/NMP mixture to give the cross-coupling products in high yields with an excellent stereoselectivity (≤99.5%). The scope of the reaction is very broad since a vast array of functional groups are tolerated (esters, nitriles, aromatic or aliphatic halides and even ketones). The procedure reported herein is an interesting alternative to the classical Pd- or Ni-catalyzed reactions, especially for preparative organic chemistry.
Cobalt-catalyzed alkenylation of organomagnesium reagents
Cahiez, Gerard,Avedissian, Hovsep
, p. 6159 - 6162 (2007/10/03)
Alkenyl iodides, bromides and chlorides react with organomagnesium reagents in THF, in the presence of Co(acac)2 and NMP (9 to 4 equiv.), to give the cross-coupling products in good yields. The reaction is chemoselective (aryl or alkyl bromides, esters and ketones) and stereoselective (≤ 99.5%).
