TY - JOUR AU - Schuster, Ildikó AU - Koch, A AU - Heydenreich, M AU - Kleinpeter, E AU - Lázár, László AU - Fülöp, Ferenc TI - Synthesis and conformational analysis of phenyl-substituted 1,3,2-oxazaphosphino[4,3-a]- and 1,2,3-oxathiazino[4,3-a]isoquinolines JF - JOURNAL OF MOLECULAR STRUCTURE J2 - J MOL STRUCT VL - 888 PY - 2008 IS - 1-3 SP - 124 EP - 137 PG - 14 SN - 0022-2860 DO - 10.1016/j.molstruc.2007.11.054 UR - https://m2.mtmt.hu/api/publication/1140193 ID - 1140193 N1 - Funding Agency and Grant Number: Hungarian Scientific Research Foundation [OTKA T 049407] Funding text: I.S. is grateful to the German Academic Exchange Service (DAAD) for a grant. The authors thank the Hungarian Scientific Research Foundation (Grant No. OTKA T 049407) for financial support. AB - Through the ring closures of tetrahydroisoquinoline 1,3-amino alcohols bearing a phenyl group in the side-chain, diastereomers of novel 1- or 2-phenyl-substituted 1,3,2-oxazaphosphino[4,3-a]isoquinoline 4-oxides, and 1,2,3-oxathiazino[4,3-a]isoquinoline 4-oxides and 4,4-dioxides were prepared. NMR analysis and DFT calculations on the prepared tetrahydroisoquinoline-condensed 1,2,3-heterocycles revealed that their conformational equilibria of cis(1)-trans-cis(2) type are influenced by the relative configuration of P-4 in the 1,3,2-oxazaphosphinanes, and by the position of the phenyl group in the 1,2,3-oxathiazines. (C) 2007 Elsevier B.V. All rights reserved. LA - English DB - MTMT ER -