59137-64-3Relevant academic research and scientific papers
Chromium-Catalyzed Linear-Selective Alkylation of Aldehydes with Alkenes
Hirao, Yuki,Kanai, Motomu,Katayama, Yuri,Mitsunuma, Harunobu
supporting information, (2020/11/18)
We developed a chromium-catalyzed, photochemical, and linear-selective alkylation of aldehydes with alkylzirconium species generated in situ from a wide range of alkenes and Schwartz's reagent. Photochemical homolysis of the C-Zr bond afforded alkyl radicals, which were then trapped by a chromium complex catalyst to generate the alkylchromium(III) species for polar addition to aldehydes. The reaction proceeded with high functional group tolerance at ambient temperature under visible-light irradiation.
Diastereoselective addition of organometallic reagents to chiral iminium ions: Synthesis of (S)-(+)-cryptostyline I
Polniaszek, Richard P.,Dillard, Lawrence W.
, p. 797 - 800 (2007/10/02)
Iminium ion 2c participates in stereoselective nucleophilic addition reactions with Grignard reagents. Analysis of the products from reaction of 5-hexenylmagnesium bromide with iminium ion 2a suggests that these reactions proceed by a polar (two electron) mechanism. The utility of this chemistry is demonstrated in a stereo specific synthesis of (5)-(+)-cryptostylina I.
Synthesis and Reaction of 1,2,4-Trioxanes
Fujisaka, Tomohiro,Miura, Masahiro,Nojima, Masatomo,Kusabayashi, Shigekazu
, p. 1031 - 1039 (2007/10/02)
The peroxides (1a-e) and epoxides (2a-g) in methylene dichloride were treated with tungsten (VI) oxide and then with catalitic amounts of chlorosulphonic acid to give the corresponding 1,2,4-trioxanes (3a-r) in 10-63percent yield.The mode of decomposition of the 1,2,4-trioxanes was studied by treating a number with the following reagents: triethylamine, sodium ethoxide, lithium di-isopropylamide, Grignard and lithium reagents, lithium aluminium hydride, anthrylsodium, triphenylphosphine, and titanium tetrachloride.
Preparation of Alkylchromium Reagents by Reduction of Alkyl Halides with Chromium(II) Chloride under Cobalt Catalysis
Takai, Kazuhiko,Nitta, Kenji,Fujimura, Osamu,Utimoto, Kiitiro
, p. 4732 - 4734 (2007/10/02)
Alkyl halides and tosylates are reduced with CrCl2 in the presence of a catalytic amount of vitamin B12 or cobalt phthalocyanine to give alkylchromium reagents, which add to aldehydes without affecting the coexisting ketone or ester groups.
