Pteridines CXX. Synthesis and Properties of Tetrahydropterins Coupled to 1,4-Dihydropyridines
作者:Wolfgang Pfleiderer、Joachim Rehse
DOI:10.3987/com-08-s(f)70
日期:——
N(2)-Isobutyroyl-5,6,7,8-tetrahydropterins (6-10) have been coupled with nicotinic acid to form the N(5)-nicotinoyl derivatives 11-15. Quaternization at the pyridine moiety led to 19-31 which can be reduced to the corresponding N-substituted 1,4-dihydropyridine dertivatives 35-39. Partial deacylation of the isobutyroyl group afforded the various types of terahydropterins 16-18, 32-34 and 40-42. The newly synthesized 5,6,7,8-tetrahydropterin derivatives have been characterized by pK(a)-determinations, UV- and NMR-spectra as well as elemental analyses.