Synthesis and conformational analysis of stereoisomeric 1- and 2-methyl-2H,4H-1,6,7,11b-tetrahydro-1,3-oxazino[4,3-a]isoquinolines☆
作者:Pál Sohár、László Lázár、Ferenc Fülöp、Gábor Bernáth、Jenő Kóbor
DOI:10.1016/s0040-4020(01)81586-6
日期:1992.6.5
4-oxo-1- or 2-methyl-9,10-dimethoxy-2H,4H-1,6,7,11b-tetrahydro-1,3-oxazino[4,3-a]isoquinoline diastereomers (a and b) 6–9, 12 and 13 were prepared. The relative configurations and the predominant conformations were determined by 1H and 13C NMR spectroscopy, use also being made of DR, DEPT, DNOE and 2D-HSC measurements.
从非对映体纯的1-(β-羟乙基)-1'-甲基-或2'-甲基-6,7-二甲氧基-1,2,3,4-四氢异喹啉(3a,b和5a,b),4-未取代的4-对硝基苯基和4-氧-1-或2-甲基-9,10-二甲氧基-2H,4H-1,6,7,11b-四氢-1,3-恶嗪[4,3-制备了a]异喹啉非对映异构体(a和b)6-9、12和13。相对构型和主要构象通过1 H和13 C NMR光谱法确定,还使用DR,DEPT,DNOE和2D-HSC测量。