14884-70-9Relevant articles and documents
Nucleophilic bromodifluoromethylation of iminium ions
Tsymbal, Artem V.,Kosobokov, Mikhail D.,Levin, Vitalij V.,Struchkova, Marina I.,Dilman, Alexander D.
, p. 7831 - 7835 (2015/03/18)
A method for bromodifluoromethylation of iminium ions using Me3SiCF2Br is described. The reaction involves room temperature activation of the silicon reagent by HMPA to generate difluorocarbene, which upon interacting with excess of bromide ion provides bromodifluoromethyl carbanionic species. The iminium electrophiles are generated in situ from aldehydes, secondary amines, proton sponge, and silyl triflate. The reaction can be extended for introduction of chlorodifluoromethyl and iododifluoromethyl groups.
Co2(CO)8-Catalyzed Ring-Opening Carbonylation of Cyclic Ethers Using N-Silylamines
Watanabe, Yoshihisa,Nishiyama, Kazuhiro,Zhang, Kunsan,Okuda, Fumio,Kondo, Teruyuki,Tsuji, Yasushi
, p. 879 - 882 (2007/10/02)
Co2(CO)8-catalyzed ring-opening carbonylation of oxiranes and oxetane smoothly proceeds with high regioselectivity under 1 atm of carbon monoxide at room temperature to give the corresponding β- and γ-siloxy amides in high yields, respectively. 1R2>+- is thought to be an active catalyst species and directs the high regioselectivity of the carbonylation.