The chromous chloride promoted addition of N-chlorocarbamates to enol ethers the synthesis of N-alkoxycarbonyl derivatives of 2-amino sugars and of α-amino ketones and aldehydes
Cs2CO3 or CaO as promoters of ethyl N-{[(4-methylphenyl)sulphonyl]oxy}carbamate in amination reactions
作者:Marco Barani、Stefania Fioravanti、Lucio Pellacani、Paolo A. Tardella
DOI:10.1016/s0040-4020(01)89425-4
日期:1994.1
Replacing triethylamine by heterogeneous inorganic bases makes it possible to animate benzene or other nitrene acceptors, using the title reagent, previously reported to be scarcely reactive. Products of C-H insertion and/or those coming from intermediate aziridines are also obtained.
A novel synthesis of N-substituted α-Amino ketones
作者:Sergio Lociuro、Lucio Pellacani、Paolo A. Tardella
DOI:10.1016/s0040-4039(00)81473-2
日期:1983.1
The thermolysis of ethyl azidoformate in enol trimethylsilyl ethers, followed by silica gel treatment, offers a new route to N-ethoxycarbonyl α-amino ketones.
The regiochemistry of the radical addition of N-chloroamides to enol ethers
作者:Gilles Caron、Jean Lessard
DOI:10.1016/s0040-4020(01)88026-1
日期:1993.9
The orientation of the radical addition of N-chloroamides (ZCONHCl) to enolethers was studied as a function of Z and the enolether structure and compared with the orientation of radical addition of thioacetic acid and the orientation of typical electrophilicadditions.
Oxidative ring-opening of aziridine-1-carboxylates with sulphoxides
作者:S. Fujita、T. Hiyama、H. Nozaki
DOI:10.1016/s0040-4020(01)93080-7
日期:——
The title reaction furnishes a practical preparation of α-carbalkoxyamino ketones from nitrene adducts of the corresponding olefins. The aziridines are alternatively accessible via addition ,of iodine isocyanate, alcoholysis and elimination of hydrogen iodide. DMSO-cleavage of cis and trans isomers of 1-carbethoxy-2-methyl-3-phenylaziridine proceeds regioselectively: the cis isomer reacts at 1,2-bond
Improved amination by ethyl n-(4-nitrophenyl)sulphonyloxy carbamate in the presence of inorganic oxides or carbonates
作者:Marco Barani、Stefania Fioravanti、M. Antonietta Loreto、Lucio Pellacani、Paolo A. Tardella
DOI:10.1016/s0040-4020(01)90402-8
日期:1994.3
Inorganic solid bases give rise to α-eliminationreactions of NsONHCO2Et under easy and mild conditions without catalyst or ultrasounds. For several kinds of substrates, a comparison of yields and reaction times with previous methods is presented.