Regio- and stereo-specific addition of chlorodibutyltin hydride to prop-2-ynylic ethers
作者:Terence N. Mitchell、Said-Nadjib Moschref
DOI:10.1039/a802160k
日期:——
A number of prop-2-ynylic ethers smoothly undergo regio- and stereo-specific hydrostannation with chlorodibutyltin hydride in good to nearly quantitative yield at room temperature in benzene.
Cyclization of Dicobalthexacarbonyl Complexes of Allyl Propargyl Ethers on the Surface of Chromatography Adsorbents. A Convenient Method for the Preparation of Substituted 3-Oxabicyclo[3.3.0]oct-5-en-7-one and 4-Hydroxymethyl-2-cyclopenten-1-one Derivatives from Common Precursors
作者:W. A. Smit、S. O. Simonyan、V. A. Tarasov、G. S. Mikaelian、A. S. Gybin、I. I. Ibragimov、R. Caple、D. Froen、A. Kreager
DOI:10.1055/s-1989-27296
日期:——
Allyl propargyl ethers serve as valuable precursors for short and efficient syntheses of the title compounds via an intramolecular [2 + 2 + 1] Khand-Pauson cyclization under the novel procedure of adsorption-promoted (dry state) conditions.
Palladium-Catalyzed Oxidative Diarylating Carbocyclization of Enynes
作者:Min Jiang、Tuo Jiang、Jan-E. Bäckvall
DOI:10.1021/ol301551x
日期:2012.7.6
efficient palladium-catalyzedoxidativediarylatingcarbocyclization of enynes is described. The reaction tolerates a range of functionalized arylboronic acids to give diarylated products in good yields. Control experiments suggest that the reaction starts with an arylpalladation of the alkyne, followed by carbocyclization, transmetalation, and reductive elimination to afford the diarylated product.
The reaction of triphenylstannylcobaloxime with enynes under photochemical and thermal conditions
作者:Masaru Tada、Yoshinobu Hanaoka
DOI:10.1016/s0022-328x(00)00550-7
日期:2000.12
is a source of the triphenylstannyl radical and cobaloxime radical. The reaction pattern is different under photochemical and thermalconditions. Photochemical reaction gave the products formed by the addition of the triphenylstannyl radical to the acetylene group followed by the tandem addition of the intermediate vinyl radical to the intramolecular olefin. Thermal reaction gave triphenylstannyl-substitution
Intramolecular cyclization of dicobalt hexacarbonyl complexes of allyl propyl ethers on adsorbent surfaces. A convenient mode of preparation of 3-oxabicyclo[3.3.0]octenes and 4-hydroxymethylcyclopentenone derivatives
作者:V. A. Smit、S. O. Simonyan、V. A. Tarasov、A. S. Gybin、G. S. Mika�lyan、A. S. Shashkov、S. S. Mamyan、I. I. Ibragimov、R. K�ipl