Preparations of carboxylic acid esters containing heptafluoroisopropyl groups
作者:T. Suyama、S. Kato、Y. Mizutani
DOI:10.1016/s0022-1139(00)80184-0
日期:1992.1
fluoroglyoxylic acidesters and fluoroformic acidesters with perfluoropropene (PFP) yielded perfluoro(3-methyl-2-oxobutyric) acidesters and perfluoroisobutyric acidesters, respectively. Oxamide derivatives and 2,3-quinoxalinediol have been prepared by the reaction of perfluoro(3-methyl-2-oxobutyric) acidesters with amines and o- phenylenediamine, respectively. Perfluoro(3-methyl-2-oxobutyric) acid esters
Conversion of Hydroxyl Groups in Alcohols to Other Functional Groups with<i>N</i>-Hydroxy-2-thiopyridone, and Its Application to Dialkylamines and Thiols
作者:Hideo Togo、Misa Fujii、Masataka Yokoyama
DOI:10.1246/bcsj.64.57
日期:1991.1
The radical decarboxylation reaction of N-alkoxyoxalyloxy-2-thiopyridone which was prepared by the reaction of alcohol, oxalyl chloride, and N-hydroxy-2-thiopyridone was studied both in the absence and presence of olefinic compounds. The same reactions with olefinic and acetylenic alcohols gave the corresponding lactone derivatives. On the other hand the unsymmetrical alkyl 2-pyridyl disulfides were obtained by the same reaction with aliphatic thiols.
N,S-Dimethyldithiocarbamyl oxalates as precursors for determining kinetic parameters for oxyacyl radicals
作者:Sara H. Kyne、Carl H. Schiesser
DOI:10.1039/c4cc06132b
日期:——
N,S-Dimethyldithiocarbamyl oxalates are novel, readily prepared precursors to oxyacyl radicals that are more suitable for kinetic studies than existing precursors.
Enantiomerically pure amines by a new method: biotransformation of oxalamic esters using the lipase from Candida antarctica
作者:Daniel T. Chapman、David H. G. Crout、Mahmoud Mahmoudian、David I. C. Scopes、Paul W. Smith
DOI:10.1039/cc9960002415
日期:——
Octyl oxalamic esters of 1-phenylethylamine and substituted 1-phenylethylamines are kinetically resolved with high stereoselectivity by lipase B from Candida antarctica.
has also been observed. Thus, photolysis of fluorenone oxime tert-butyl oxalate results in the formation of tert-butoxycarbonyl radicals, which subsequently decay, mainly yielding CO2 and tert-butyl radicals. The benzyloxycarbonyl radical and the acetoneiminoxycarbonyl radical both decarboxylate too rapidly to be detected with our spectrometer (25 ns rise-time). Upon purging the solution with oxygen