Allylacetylenes and their derivatives as inhibitors of steel corrosion in sulfuric acid
摘要:
New functionalized derivatives of allylacetylenes were prepared, and their ability to inhibit corrosion of St.3 low-carbon steel in 5 N sulfuric acid was studied. The effectiveness of inhibition of steel corrosion was studied in relation to the structure of acetylene derivatives, their concentration, and temperature of acidic medium.
Palladium-Catalyzed Regiodivergent Substitution of Propargylic Carbonates
作者:Theresa M. Locascio、Jon A. Tunge
DOI:10.1002/chem.201603481
日期:2016.12.12
The palladium(0)‐catalyzed, ligand‐controlled, regioselective addition of diaryl acetonitrile pronucleophiles to propargylic carbonates is reported. Selective formation of either terminal 1,3‐dienyl or propargylated products is proposed to arise from a change in reaction mechanism controlled by the denticity of the coordinating ligand.
Investigation of diene condensation of primary vinylacetylene and allylacetylene alcohols and their ethers and esters with polychlorocyclic dienes
作者:M. G. Veliev、A. Z. Chalabieva、A. F. Mamedova
DOI:10.1134/s1070428009050029
日期:2009.5
The diene condensation of primary vinylacetylene and allylacetylene alcohols, their esters and ethers with polychlorocyclopentadienes proceeded regioselectively at the double bond of the dienophile leading to the formation of the corresponding polychlorobicyclic adducts of the endo-configuration. Kinetic parameters were determined, quantum-chemical calculations of dienes and some dienophiles were performed
Stereoselective Synthesis of the C9–C19 Fragment of Lyngbyaloside B and C via Ether Transfer
作者:Eric Stefan、Richard E. Taylor
DOI:10.1021/ol301455p
日期:2012.7.6
A stereoselectivesynthesis of the C9–C19 fragment of lyngbyaloside B and C highlighted, by an extension of our ethertransfer methodology, enables the formation of tertiary ethers. 2-Naphthylmethyl ethers have been shown to proceed efficiently through ethertransfer with high stereoselectivity and are easily deprotected by DDQ oxidation. Variation of the workup conditions results in the stereoselective
lyngbyaloside B 和 C 的 C9-C19 片段的立体选择性合成突出显示,通过我们的醚转移方法的扩展,能够形成叔醚。2-萘基甲基醚已被证明可以通过醚转移有效进行,具有高立体选择性,并且很容易通过 DDQ 氧化脱保护。后处理条件的变化导致合成-1,3-二醇单醚或二醚的立体选择性形成。
Synthesis of Tri-, Tetra-, and Pentacarbonyl Derivatives via Ozonolysis of 1,4-Dienes and Cyclization to Polyaromatic Systems
作者:Laura Kersten、Klaus Harms、Gerhard Hilt
DOI:10.1021/jo502308d
日期:2014.12.5
was the synthesis of polyaromatic systems by cyclization of β-polycarbonyls. Useful synthons for β-polycarbonyl derivatives are branched 1,4-dienes generated by cobalt-catalyzed hydrovinylation of terminal alkenes and 2,3-dimethyl-1,3-butadiene. Thus, a series of tri-, tetra-, and pentacarbonyl synthons was successfully synthesized. Subsequently, these synthons were examined in an ozonolysis/cyclization
Zur Abgabe von Insektiziddämpfen bestimmte, in oder auf einem Heizapparat verwendbare Vorrichtung, die aus mehreren unterschiedlichen, nebeneinander angeordneten festen Zusammensetzungen besteht, welche jeweils einen auf Insekten wirkenden Stoff enthalten, der in einer saugfähigen Grundmasse absorbiert ist, wobei man diesen Stoff, in mindestens einer der Zusammensetzungen, unter Pyrethrinoiden und Isopyrethrinoiden auswählt.