Identification of New, Odor-Active Thiocarbamates in Cress Extracts and Structure−Activity Studies on Synthesized Homologues
作者:Katharina Breme、Xavier Fernandez、Uwe J. Meierhenrich、Hugues Brevard、Daniel Joulain
DOI:10.1021/jf062856e
日期:2007.3.1
botanical order Brassicales and produces glucosinolates, which are important precursors of nitrogen- and sulfur-containing compounds. Those compounds often present low perception thresholds and various olfactive notes and are thus of interest to the flavor and fragrance chemistry. When the study of organonitrogen and organosulfur compounds is undertaken, Brassicale extracts are one of the matrices of choice
Effect of successive increase in alcohol chains on reaction with isocyanates and isothiocyanates
作者:Shahnaz Perveen、Arfa Yasmin、Khalid Mohammed Khan
DOI:10.1080/14786410802270738
日期:2010.1.10
The reaction of isocyanates and isothiocyanates with long-chain alcohols, e.g. n-hexanol, n-heptanol and n-octanol, exclusively gave N-aryl-O-alkyl carbamates, while N-aryl-O-alkyl carbamates were formed along with symmetrical 1,3-disubstituted ureas and thioureas when the same reactions were carried out with small-chain alcohols at room temperature without using any solvent.
Concomitant Desulfurization and Transesterification of Alkyl Thionocarbamates
作者:Uday M. Joshi、Laxmikant N. Patkar、Srinivasachari Rajappa
DOI:10.1081/scc-120027235
日期:2004.12.31
Abstract Alkyl carbamate (such as 1) reacts with triphosgene at the nitrogen atom, whereas the analogous thionocarbamates (5) react at the sulfur. Subsequent treatment with various phenols or alcohols leads to the corresponding aryl carbamates or alkyl carbamates (6) respectively. The process thus involves both desulfurization and transesterification.