Bifunctional compounds from reaction of alkoxy hydroperoxides with metal salts
作者:G. Cardinale、J.A.M. Laan、D. Van Der Steen、J.P. Ward
DOI:10.1016/s0040-4020(01)91447-4
日期:1985.1
with ferrous sulfate. C-C bond scission and radical formation was followed by dimerization of the radicals formed. Ozonides reacted similarly. Acyclic and cyclic olefins, including a cyclic enol ether, gave rise to a range of α,ω-disubstituted products in modest yields. By using ferric chloride, ω-chloro esters were obtained from the alkoxy hydroperoxides derived from olefinic esters.
Efficient acetalisation of aldehydes catalyzed by titanium tetrachloride in a basic medium
作者:Angelo Clerici、Nadia Pastori、Ombretta Porta
DOI:10.1016/s0040-4020(98)00982-x
日期:1998.12
The acetalisation of aliphatic and aromatic aldehydes is achieved in a basic medium by using catalytic amount of Ti(IV) chloride in MeOH in the presence of NH3 or Et3N. The present protocol shows many advantages over the well known base or acid catalysis: in fact, in contrast to base-promoted acetalisation, aldehydes with electron-rich carbonyl groups react easily, enolizable aldehydes do not undergo
Direct and indirect electrochemical generation of alkoxycarbenium ion pools from thioacetals
作者:Kouichi Matsumoto、Koji Ueoka、Shinkiti Suzuki、Seiji Suga、Jun-ichi Yoshida
DOI:10.1016/j.tet.2009.09.020
日期:2009.12
Thioacetals were found to be effective precursors to generate and accumulate alkoxycarbeniumions based on direct and indirect cation pool methods. Alkoxycarbeniumions thus generated reacted with carbonnucleophiles such as allylsilanes and enol silyl ethers to give C–C bond formation products in good yields.
In the presence of a catalytic amount of trityl perchlorate, acetal-type peroxides are successfully prepared from dimethyl acetals and t-butyl trimethylsilyl peroxide in good yields. The peroxides thus obtained are converted to the corresponding methyl esters also in good yields.
Electrochemical Oxidation of 1-Phenylthio-1-trimethylsilylalkanes
作者:Jun-ichi Yoshida、Sachihiko Isoe
DOI:10.1246/cl.1987.631
日期:1987.4.5
Electrochemical oxidation of 1-phenylthio-1-trimethylsilylalkanes in the presence of alcohol resulted in facile cleavage of the carbon–silicon bond and formation of the corresponding acetals.