Thermal transformations of oxazole endoperoxides: Rearrangements, fragmentations and methanol additions
作者:Klaus Gollnick、Sigrid Koegler
DOI:10.1016/0040-4039(88)85320-6
日期:1988.1
Oxazole endoperoxides carrying a phenyl group at C-2 rearrange to triacylamines ; those carrying a hydrogen atom at C-2 undergo a fragmentation into 1:1 mixtures of nitriles (or HCN) and anhydrides , whereas methyl substitution at C-2 gives rise to competition between these two modes of reaction. Methanol addition to leads to4-methoxy-5-hydroperoxides which easily transform into methyl esters and diacylamines
The pteridin-2,4,7-trione 6,8'-endoperoxides are synthesized and their thermal reactions are examined. The pteridin-2,4,7-triones (1) reacted smoothly with singlet oxygen to yield the 6,8'-endopoothly with singlet oxygen to yield the pteridin-2,4,7-trione 6,8'-endoperoxides (2-5). On warming the endoperoxide (2a) reverted to the starting pteridin-2,4,7-trione (1a) with liberation of singlet oxygen, which was confirmed by trapping experiment using typical singlet oxygen acceptors (7-12).
The Diacylation of Amides by Acyl Chloride—Pyridine Compounds
作者:Quentin E. Thompson
DOI:10.1021/ja01156a115
日期:1951.12
Iesce, M. Rosaria; Graziano, M. Liliana; Cimminiello, Guido, Journal of the Chemical Society. Perkin transactions II, 1991, # 7, p. 1085 - 1089
作者:Iesce, M. Rosaria、Graziano, M. Liliana、Cimminiello, Guido、Cermola, Flavio、Parrilli, Michelangelo、Scarpati, Rachele