γ-Phenylseleno α,β-unsaturated esters, prepared from α-phenylseleno aldehydes by Horner-Emmons reaction and treated with bromine or sulfuryl chloride, form adducts whose decomposition leads to α-halo β,γ-unsaturated esters in fair to good yields.
4-[4-(5-Trifluoromethyl-2-pyridyloxy)phenoxy]-2-pentenoic acid esters, a herbicidal composition containing the same, and a method of controlling weeds using the same.
Routes of formation and crystal structure of an alkylperoxycobaloxime: bis[dimethylglyoximato(1–)](4-ethoxycarbonylbut-3-en-2-ylperoxo)(pyridine)cobalt(<scp>III</scp>)
作者:Nathaniel W. Alcock、Bernard T. Golding、Samson Mwesigye-Kibende
DOI:10.1039/dt9850001997
日期:——
photolysis of 2-ethoxycarbonylbut-3-enyl(pyridine)cobaloxime proceeds via the 2-ethoxycarbonylbut-3-enyl radical, which rearranges to the 1-ethoxycarbonylbut-3-enyl radical. This radical reacts with cobaloxime(II) to give hydridocobaloxime and 1-ethoxycarbonylbuta-1,3-diene. Recombination of these species yields 3-ethoxycarbonyl-1-methylallyl(pyridine)cobaloxime and hence the alkylperoxycobaloxime. The structure
Herbicidal 4-((benzimidazol-1-yl)phenoxy)alkanoic acids, esters and salts
申请人:Shell Oil Company
公开号:US04439226A1
公开(公告)日:1984-03-27
Certain 4-((benzimidazol-1-yl)phenoxy)alkanoic acids, esters and salts, useful as herbicides.
某些4-((苯并咪唑-1-基)苯氧基)烷酸,酯和盐,可用作除草剂。
Reaction of β-trimethylsiloxy α-diazocarbonyl compounds with trimethylsilyl halides: a novel diazo decomposition process
作者:Fengping Xiao、Zhenhua Zhang、Jian Zhang、Jianbo Wang
DOI:10.1016/j.tetlet.2005.10.070
日期:2005.12
When β-trimethylsiloxy α-diazocarbonyl compounds were treated with trimethylsilyl halide, a mixture of α- and γ-halide substituted unsaturated carbonyl compounds was obtained. The mechanism of this novel diazo decomposition process is discussed.