The palladium‐catalyzed oxidative carbonylation of amines toward the synthesis of oxalamides has been established around 30 years ago and it usually needs the presence of (over)stoichiometric amounts of oxidant. In this work, the first transformation of this type in which the oxidant was replaced by visible light is described. The new approach uses a simple robust Pd complex, which can even be partially
N,N-disubstituted lithium bis(carbamoyl)cuprate. A convenient complex for one-pot conversions of amines to formamides, oxamides, carbamates, and oxamic acids
作者:Yoshiaki Wakita、Shun-Ya Noma、Minoru Maeda、Masaharu Kojima
DOI:10.1016/0022-328x(85)80441-1
日期:1985.12
Lithiumbis(carbamoyl)cuprates (2) were readily derived from secondary amines such as N-methylaniline, N-methylbenzylamine, and diethylamine, under mild carbonylation conditions (0°C, 1 atm of carbon monoxide), but diphenylamine and benzylphenylamine were unsuitable as the starting materials. The carbamoylcopper complexes 2 formed in ether were readily converted to the corresponding formamides, oxamides
Reactivity of Carbamoyl Radicals. A New, General, Convenient Free-Radical Synthesis of Isocyanates from Monoamides of Oxalic Acid
作者:Francesco Minisci、Francesca Fontana、Fausta Coppa、Yong Ming Yan
DOI:10.1021/jo00122a020
日期:1995.9
A new, general, simple synthesis of isocyanates was developed by oxidation of monoamides of oxalic acid with peroxydisulfate catalyzed by Ag and Cu salts. The reaction was carried out in a two-phase system (water and an organic solvent), and it is suitable also for practical applications, due to the simple experimental conditions and the inexpensive as well as nontoxic reagents. The first example of homolytic intramolecular aromatic carbamoylation is also reported.
CRUMRINE, D. S.;DIESCHBOURG, T. A.;OTOOLE, J. G.;TASSONE, B. A.;VANDEBURG+, J. ORG. CHEM., 52,(1987) N 16, 3699-3701
作者:CRUMRINE, D. S.、DIESCHBOURG, T. A.、OTOOLE, J. G.、TASSONE, B. A.、VANDEBURG+
DOI:——
日期:——
Sodium metal-promoted condensations of carbamates
作者:David S. Crumrine、Thomas A. Dieschbourg、James G. O'Toole、Benjamin A. Tassone、Suzanne C. Vandeburg