Facile Synthesis of Bicyclo
Orthoesters and Bicyclo Amide Acetals Using α,α-Difluoroalkylamines
作者:Shoji Hara、Seiko Tange、Tsuyoshi Fukuhara
DOI:10.1055/s-0028-1083145
日期:——
triols or diethanolamine using - difluoroalkylamines. The reaction proceeds under milder condi- tions compared with the conventional methods. 4-tert-Butyl-1-(4- ethynylphenyl)trioxabicyclo(2.2.2)octane, a newclass of insecti- cide, was prepared from a triol in 3 steps using a difluoroalkyla- mine.
Photochemical reactions of substituted benzenes with aliphatic amines
作者:Andrew Gilbert、Stefan Krestonosich、David L. Westover
DOI:10.1039/p19810000295
日期:——
described. Reaction pathways involving both substitution and 1,2-and 1,4-acyclic addition processes are observed and which predominates depends upon the arene substituent. The novel acyclic adduct, Me2 CCH–CHCH–CHNBut, is obtained from toluene and t-butylamine and, contrary to previous reports, chlorobenzene yields arene-amine 1 : 1 adducts as well as the amine α-substitution product (16); benzonitrile
Selective mono-acylation of 1,2- and 1,3-diols using (α,α-difluoroalkyl)amines
作者:Natsumi Wakita、Shoji Hara
DOI:10.1016/j.tet.2010.08.029
日期:2010.10
3-diols, selective mono-benzoylation occurs to afford mono-esters of the diols in good yield. The reaction is completed under mild conditions in a short reaction time. Further, prim-, sec-, and tert-diols and catechol can be converted to the corresponding mono-benzoates. DFBA is used for the protection of the hydroxy group in sugars. The selective mono-nicotinylation, formylation and pivaloylation of diols
[EN] NOVEL 4-FLUOROPYRROLIDINE-2-CARBONYL FLUORIDE COMPOUNDS AND THEIR PREPARATIVE METHODS<br/>[FR] NOUVEAUX FLUORURES DE 4-FLUOROPYRROLIDINE-2-CARBONYLE ET LEURS MÉTHODES DE SYNTHÈSE
申请人:IM & T RES INC
公开号:WO2010081014A1
公开(公告)日:2010-07-15
Novel 4-fluoropyrrolidine-2-carbonyl fluoride compounds as useful fluorinated intermediates are disclosed. Their preparative methods are also disclosed. Useful applications of the 4-fluoropyrrolidine-2-carbonyl fluorides are shown.
The present invention relates to α,α-difluoroamines, fluorinating reagents comprising α,α-difluoroamines and also processes for preparing α,α-difluoroamines and fluorinating reagents comprising α,α-difluoroamines.