4,5-Dibenzyloxybenzyne as a synthon for diels-alder reactions. The synthesis of 6,7-dihydroxy-1,4-ethano-1,2,3,4-tetrahydroisoquinolines as rigid analogs of adrenergic agents. Assignment of proton and carbon-13 NMR parameters using homonuclear and heteronuclear two-dimensional chemical shift correlation NMR spectroscopy
作者:Frank W. Muellner、Ashraf N. Abdel-Sayed、Ludwig Bauer
DOI:10.1002/jhet.5570220426
日期:1985.7
lithium aluminum hydride to provide 6,7-dihydroxy-1,4-ethano-1,2,3,4-tetrahydroisoquinolines. Homonuclear and heteronuclear two-dimensional chemical shift correlation nmr spectroscopy confirmed the structure of the bridged tetra-hydroisoquinolines and led to the unambiguous assignment of the 1H and 13C nmr chemical shifts of key compounds.
据报道,儿茶酚胺型肾上腺素能药物的几种刚性类似物的合成。他们的合成开始于将4,5-二苄氧基苯并(由4,5-二苄氧基-邻氨基苯甲酸生成)的Diels-Alder环加成反应成1-(2-反式-苯基乙烯基)-2-吡啶酮和1-苄基-3-苄氧基- 2-吡啶酮。如此产生的不饱和酰胺首先用氢和钯还原,然后用氢化铝锂还原,得到6,7-二羟基-1,4-乙醇-1,2,3,4-四氢异喹啉。同核和异核二维化学位移相关核磁共振波谱证实了桥接的四氢异喹啉的结构,并导致关键化合物的1 H和13 C核磁共振化学位移明确分配。