Synthesis and structural analysis of tetra- and pentacyclic lactams derived from regioisomeric tetrahydroisoquinoline diamines
作者:Henri Kivelä、Petri Tähtinen、Olli Martiskainen、Kalevi Pihlaja、László Lázár、Edina Vigóczki、Ferenc Fülöp
DOI:10.1016/j.molstruc.2010.08.031
日期:2010.11
populate two types of conformations in CDCl 3 solution, the preferred conformation being determined by the substitution on the lactam ring. These conformers are related by ringinversion of the approximately half-chair-like tetrahydropyridine ring, combined with a pyramidal inversion of its nitrogen atom. For the other combinations of regio- and diastereochemistry, the preferred conformation was not strongly