17614-10-7Relevant articles and documents
-
Mukaiyama et al.
, p. 49,51 (1953)
-
A facile synthesis of sulfonylureas: Via water assisted preparation of carbamates
Tanwar, Dinesh Kumar,Ratan, Anjali,Gill, Manjinder Singh
, p. 4992 - 4999 (2017/07/11)
A novel and simple approach to the synthesis of sulfonylureas has been reported. It involved the reaction of various amines with diphenyl carbonate to yield the corresponding carbamates, which subsequently reacted with different sulphonamides to produce different sulfonylureas in excellent yields. The first reaction of diphenyl carbonate with amines was carried out in aqueous:organic (H2O:THF, 90:10) medium at room temperature to produce carbamates that paved a straightforward route to sulfonylureas after reaction with sulfonamides. The above process avoided traditional multistep protocols and the use of hazardous, irritant, toxic and moisture sensitive reagents such as phosgene, isocyanates and/or chloroformates.
Facile preparation of 2-iodophenyl trifluoromethanesulfonates: Superior aryne precursors
Ganta, Ashok,Snowden, Timothy S.
, p. 2227 - 2231 (2008/02/10)
A comparative study of 3-methoxyaryne precursors revealed 2-iodo-3-methoxyphenyl triflate as the most effective in nonpolar solvent. Use of Hoppe's N-isopropyl carbamate allows for the systematic preparation of a variety of 2-iodophenyl triflates via a directed ortho-lithiation-iodination- decarbamation sequence. These steps are possible without isolation of the intermediate iodophenyl carbamates. Georg Thieme Verlag Stuttgart.