Transesterification of alkyl carbamate to aryl carbamate : Effect of varying the alkyl group.
摘要:
Phosphorus oxychloride mediated transesterification of four alkyl N-methylcarbamates to several aryl N-methylcarbamates has been studied. Best yields are obtained from benzyl N-methylcarbamate.
Photochemistry of <i>N-</i>Acetyl-, <i>N-</i>Trifluoroacetyl-, <i>N-</i> Mesyl-, and <i>N-</i>Tosyldibenzothiophene Sulfilimines
作者:Vasumathi Desikan、Yonglin Liu、John P. Toscano、William S. Jenks
DOI:10.1021/jo702654q
日期:2008.6.1
Time-resolved infrared (TRIR) spectroscopy, product studies, and computational methods were applied to the photolysis of sulfilimines derived from dibenzothiophene that were expected to release acetylnitrene, trifluoroacetylnitrene, mesylnitrene, and tosylnitrene. All three methods provided results for acetylnitrene consistent with literature precedent and analogous experiments with the benzoylnitrene
N-chlorosulfinylcarbamate esters are produced by the reaction of thionyl chloride with carbamate esters having one unsubstituted hydrogen on the carbamate nitrogen atom, preferably in the presence of a hydrogen chloride acceptor. The resulting N-chlorosulfinylcarbamate esters are useful intermediates in the preparation of pesticides having relatively low mammalian toxicity.