Substrate-controlled divergent remote C–H and N–H polyfluoroarylation of 2-aminopyrimidines with polyfluoroarenes via Pd(ii)/Pd(0) catalysis
摘要:
Substrate-controlled product divergence is demonstrated in Pd-catalyzed reaction of 2-aminopyrimidines. Remote C5–H polyfluoroarylation occurs with N-alkylpyrimidine-2-amines, while N–H polyfluoroarylation is dominant for N-aryl-pyrimidine-2-amines.
Substrate-controlled divergent remote C–H and N–H polyfluoroarylation of 2-aminopyrimidines with polyfluoroarenes via Pd(ii)/Pd(0) catalysis
摘要:
Substrate-controlled product divergence is demonstrated in Pd-catalyzed reaction of 2-aminopyrimidines. Remote C5–H polyfluoroarylation occurs with N-alkylpyrimidine-2-amines, while N–H polyfluoroarylation is dominant for N-aryl-pyrimidine-2-amines.
Basic techniques of working on a solid phase: From ABC of the peptide synthesis to libraries of non-natural amino acids
作者:E. V. Babaev、D. S. Ermolat’ev
DOI:10.1134/s107036321012025x
日期:2010.12
Libraries of hardly available amino acids bearing a heteroaromatic ring (2-pyrimidyl, substituted 2-pyridyl or 2-thiazolyl) at the amino group were prepared using solid-phase synthesis on various resins. The synthesized compounds are structurally similar to some known antidiabetic drugs. The paper combines features of a review (elementary introduction to the solid-phase synthesis methodology and technique for beginners and selected methods from peptide chemistry) and step-by-step experimental protocols (tested by the authors) useful as a methodic tool. The presented protocols (immobilization and modification of amino acids, placing and removal of common protective groups) require no sophisticated equipment and may be useful as pictorial introductory tasks for students education.