Acylation or phosphorylation of hydroxyurea unexpectedly takes place on N rather than on O, leading to the formation of amides instead of the expected estersurea derivatives (acyclic compoundsprotection, deprotectionhydrosilylation, silylation, phosphorylation...
Background: Earlier we found that the reaction of 4-benzoyl-5-phenylamino-2,3-dihydrothiophene- 2,3-dione (1) with primary aromatic amines, secondary aliphatic amines and N,N'-dinucleophiles such as 1-aminoguanidine, guanidine, urea, and... K Hassan,A Samaneh,M Nazanin,... - 《Letters...
N-acetylureas were synthesised regioselectively from 1,3-disubstituted selenoureas and zinc acetate. Regioselectivity was dependent on the pKa of the amine attached to the selenourea and occurred towards the amine with the lower pKa. The approach provided a simple, mild and efficient way to ...
Neutral Pan-EB was reacted with benzoyl chloride, p-t -butylbenzoyl chloride or pivaloyl chloride in N,N 鈥 -dimethylpropylene urea (DMPU) solutions. While the benzoyl and pivaloyl derivatives showed very poor solubility in common organic solvents, the p-t -butylbenzoyl derivative was re...
The carbamyl fluoride SF 5 NHC(O)F reacts with both H 2 O and H 2 S to give the urea (SF 5 NH) 2 CO. Evidence supports that this reaction proceeds through a mechanism involving dehydrofluorination; whereas, the reagents PhLi and PCl 5 serve only to dehydrofluorinate SF 5 NHC(O)F...
urea derivatives (benzene compounds)ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a "Full Text" option. The original...
urea derivatives (benzene compounds)ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a "Full Text" option. The original...
urea derivatives (benzene compoundscarboxylic amides (benzene compoundsCycloalkylation of N -phenyl- N ′-R-thiourea with 3-aryl-2-propenoyl chlorides in acetone gives as products 6-aryl-3-phenyl-2-(R-imino)-2,3,5,6-tetrahydro-4 H -1,3-thiazin-4-one and their hydrochlorides. The same...
Distillation of the crude extract leads to naphthyridones 12 (yield up to 10%) which result from thermocyclization of the enamides 5f, 5g and 7f. Various by-products are isolated such as N, N-dimethyl-N', N'-diphenylmethyleneurea resulting from N-lithiodiphenylketimine and phenacylpyridines...
urea derivatives (benzene compounds)carboxylic amides (benzene compounds)ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.V. N. Britsun...