Reaction of 1,1,2-trichloro-1,2,2-trifluoroethane and other fluorohalocarbons with aluminum halides in the presence and absence of additives. Distinction in carbonium ion character and reaction conditions between substitution and isomerization
A 2,2-dimethylcyclopropanecarboxylic acid derivative having the formula: ##STR1## wherein R.sup.1 is an alkyl group or an aryl group, R.sup.2 is a hydrogen atom, an acyl group, a sulfonyl group or an alkyl group, and each of X.sup.1 and X.sup.2 is a halogen atom.
Facile Conversion of Aldehydes into 1-Substituted 2-Chloro-3,3-difluoro-2-propen-1-ols with 1,1-Dibromo-1-chloro-2,2,2-trifluoroethane/Magnesium Reagent
作者:Makoto Fujita、Tamejiro Hiyama
DOI:10.1246/bcsj.61.3321
日期:1988.9
Aldehydes RCHO are converted in excellent yields into chlorodifluoroallyl alcohols RCH(OH)CCl=CF2 upon treatment with CClBr2CF3 and magnesium in tetrahydrofuran at 0 °C.
Fluorohalogeno compounds. I. The grignard reaction of some fluorohalogenoethanes
作者:I. Hemer、A. Pošta、V. Dědek
DOI:10.1016/s0022-1139(00)80974-4
日期:1984.12
An extension of the scope of the Grignardreaction of fluorinated compounds is reported. Fluorohalogenoethanes of the general formula CF3CXYZ ( X = F,Cl,Br ; Y,Z = Cl,Br ) were found to undergo smoothly the metal-halogen exchange reaction with alkyl- or aryl-magnesium halides at low temperature to yield organometallic compounds CF3CXYMgHal. The Grignard compounds were reacted with a series of aldehydes
Efficient carboncarbon bond formation with thermally stable 1,1-dihalo-2,2,2-trifluoroethylzinc reagent
作者:Makoto Fujita、Tomoe Morita、Tamejiro Hiyama
DOI:10.1016/s0040-4039(00)84468-8
日期:1986.1
The zinc carbenoids CF3CX2ZnX, prepared from CF3CX3 and zinc powder in dimethylformamide, were found thermally stable to add to aldehyde carbonyls in excellent yields.