Solid-Phase Synthesis of Disubstituted N-Acylureas from Resin-Bound Ureas and Acyl Chlorides
摘要:
Acylureas (ureides) are valued for their important biological activities. Whereas cyclic acylureas have frequently been the object of solid-phase chemistry, only few reports have focused on the solid-supported preparation of acyclic representatives. We have prepared different types of acylureas on Rink amide resin in three or four steps. The products are either N-acylated (9, 18), N-acylated-N'-allcylated (10, 19), or N-acylated-N-alkylated (22). Characteristic NMR parameters of isomeric acylureas 10, 19, and 22 are discussed.
Synthesis of Nitrogen-Containing Phenoxyacetic Acid Derivatives
作者:E. T. Yamansarova、O. S. Kukovinets、R. A. Zainullin、F. Z. Galin、M. I. Abdullin
DOI:10.1007/s11178-005-0201-3
日期:2005.4
Nitrogen-containing phenoxyacetic acid derivatives were synthesized by reactions of substituted phenoxyacetic acids with amines, urea, and ethyl carbamate.