Photoreduction des esters car☐yliques dans l'hexamethylphosphortriamide (HMPT)
作者:C. Portella、H. Deshayes、J.P. Pete、D. Scholler
DOI:10.1016/s0040-4020(01)88794-9
日期:1984.1
Use of HMPT as solvent in photochemistry allows efficient photoreductions. Alkyl esters and especially non absorbing alkyl acetates are photoreduced in excellent yields into alkanes. In the latter case, a protonating agent is necessary. Numerous examples illustrate the generality and convenience of the reaction. This photoreduction involves an electron transfer from HMPT to ester.
Deoxygenation of tertiary and secondary alcohols ROH by thiol-catalysed radical-chain redox decomposition of derivatives ROCH2X to give RH and XCHO
作者:Hai-Shan Dang、Brian P. Roberts
DOI:10.1039/b202411j
日期:2002.4.26
electron-donating alkoxy, aryl or amido group, undergo thiol-catalysed radical-chain decomposition to give RH and XCHO. This reaction has been applied for the deoxygenation of representative tertiary and secondary alcohols ROH under metal-free conditions that require no stoichiometric co-reactant. Of the derivatives investigated, methoxymethyl (MOM) ethers and 1-alkoxymethylpyrrolidin-2-ones (PYRM ethers)
STEROIDS: VIII. SOME REACTIONS OF THE 3-METHYLCHOLEST-5-EN-3-OLS AND THEIR DERIVATIVES
作者:G. Just、V. Di Tullio
DOI:10.1139/v64-397
日期:1964.12.1
The preparation and ethanolysis of 3-methylcholesteryl derivatives is described. It was noticed that Δ5-3-methyl-3-oxygenated steroids undergo hydrogenolysis, which can be suppressed by addition of sodium nitrite.