Transposition oxy-cope assistee par le trifluoroacetate mercurique en quantite stoechiometrique et en quantite catalytique
作者:Norbert Bluthe、Max Malacria、Jacques Gore
DOI:10.1016/0040-4020(84)85011-5
日期:1984.1
Tertiary 1,5-hexadien-3-ols are transformed at room temperature into δ-ethylenic ketones in 35-90%, yields under two sets of conditions: treatment with one molar equivalent of mercuric trifluoroacetate followed by demercuration of the intermediate α-mercuro ketone with sodium borohydride; and treatment with 0.2 molar equivalent of t of lithium trifluoroacetate or trifluorométhansulfonate. The reactions
[EN] PROCESS FOR THE SYNTHESIS OF BETA-AMINOCARBONYLS<br/>[FR] PROCÉDÉ DE SYNTHÈSE DE BÉTA-AMINOCARBONYLES
申请人:UNIV OTTAWA
公开号:WO2013067646A1
公开(公告)日:2013-05-16
The present application provides processes and intermediates useful in the production of β- aminocarbonyl- or β-aminothiocarbonyl-containing compounds. Provided herein is a process for synthesizing β-aminocarbonyl- or β-aminothiocarbonyl-containing compounds from an alkene and a hydrazone. Also provided herein is a process for synthesizing β-aminocarbonyl- or β-aminothiocarbonyl-containing compounds from an alkene and a hydrazine. The present application further provides intermediate aminoisocyanate and iminoisocyanate compounds, and methods for synthesizing the starting hydrazone and hydrazine compounds.
Bicyclic diazenium salts have been prepared from α-chloroazo species via a Lewis acid-mediated intramolecular cycloaddition. An alternative, more direct, route to these salts by the reaction of hydrazones with dimethylsulfonium ditriflate is also described. Terminal olefins provided mixtures of fused and bridged bicyclic diazenium salts. The ratio of the fused and bridged species was observed to depend
γ-Trialkylstannyl ketones underwent cyclobutanation, C-C bond cleavage, or 1,5-hydride shift, depending upon the substitution pattern of the substrates.
根据底物的取代模式,γ-三烷基锡酮发生了环丁烷化、C-C 键裂解或 1,5-酸酐转移。
Oxidative fragmentation of γ-hydroxyalkyl stannanes stereospecific formation of (e) and (z)-keto olefins
作者:Kazuhiko Nakatani、Sachihiko Isoe
DOI:10.1016/s0040-4039(01)81597-5
日期:——
Treatment of γ-hydroxyalkyl stannanes with lead tetraacetate in refluxing benzene leads to the stereospecificformation of (E) and (Z)-keto olefins according to the stereochemistry of the starting materials in excellent yield.