作者:Eva Jedlovská、Lubor Fišera、Albert Lévai、Gábor Tóth、Barbara Balázs
DOI:10.1002/jhet.5570360442
日期:1999.7
stereoselective synthesis of spiropyrazolines 7 and 8 via 1,3-dipolar cycloaddition of C-2-(5-nitrofuryl)-N-methylnitrilimine, C-2-(5-nitrofuryl)-N-phenylnitrilimine and C-4-nitrophenyl-N-methyl-nitrilimine to (E)-3-benzylidenechromanone (1), -1-thiochromanone 2, -1-tetralone 3 and (E)-3-benzylidene-flavanone (4) is reported. The relative configuration and conformations of the spiropyrazolines were elucidated
通过C -2-(5-硝基呋喃基)-N-甲基硝胺,C -2-(5-硝基呋喃基)-N-苯基硝胺和C -4的1,3-偶极环加成反应合成螺并吡唑啉7和8 。报道了-硝基苯基-N-甲基-亚硝胺对(E)-3-亚苄基苯并二氢呋喃酮(1),-1-硫代苯并二氢吡喃酮2,-1-四氢萘酮3和(E)-3-亚苄基-黄烷酮(4)。螺吡唑啉的相对构型和构象通过各种核磁共振方法进行了阐明。