作者:Kiyoshi Sato、Shuichi Okazaki、Takamichi Yamagishi、Sadao Arai
DOI:10.1002/jhet.5570410324
日期:2004.5
A new short-step synthesis of 8a-azonia[6]helicene (1) and the novel dithieno derivatives (2 and 3) is described. Double photocyclization of 2,8-distyrylquinolizinium salt (8) gave 1 in 35% yield. Similarly, 2,8-bis[2-(2-thienyl)vinyl]- and 2,8-bis[2-(3-thienyl)vinyl]-quinolizinium salts (9 and 10) afforded new azonia[6]helicenes containing two thiophene rings at the ends of helix, that is 7a-azonia-3
描述了一种新型的8a-氮杂[6]螺旋烯(1)和新型二硫杂诺衍生物(2和3)的短步合成方法。2,8-二distyrylquinolizinium盐的双photocyclization (8) ,得到1在35%的产率。同样,2,8-双[2-(2-噻吩基)乙烯基]-和2,8-双[2-(3-噻吩基)乙烯基]-喹啉鎓盐(9和10)提供新的氮杂[6]螺旋烯螺旋末端有两个噻吩环,分别是43a和35%的7a- azonia-3,12-dithia [6] helicene (2)和7a- azonia -1,14-dithia [6] helicene (3)产量分别。他们的1 H和13的总分配C-nmr光谱是利用二维和NOE nmr光谱法进行的。