Syntheses of 7-Substituted Anthra[2,3-<i>b</i>]thiophene Derivatives and Naphtho[2,3-<i>b</i>:6,7-<i>b’</i>]dithiophene
作者:Mustafa A. Al-jumaili、Simon Woodward
DOI:10.1021/acs.joc.8b01770
日期:2018.9.21
7-R-Anthra[2,3-b]thiophene derivatives (1, R = H, Me, i-Pr, or MeO) are prepared in three steps (in average overall yield >50%) starting from (E)-4-RC6H4CH2(HOCH2)C═CI(CH2OH). The latter are commercial or readily prepared from 2-butyne-1,4-diol and ArCH2Cl (both costing <1 cent/mmol) at 10 g scales. These allow for the selective formation of (otherwise unattainable) higher solubility 7-derivatives
从(E)-开始,分三步制备7-R-蒽[2,3- b ]噻吩衍生物(1,R = H,Me,i -Pr或MeO)(平均总收率> 50%)。 4-RC 6 H 4 CH 2(HOCH 2)C═Cl(CH 2 OH)。后者是商购的或易于由2-丁炔-1,4-二醇和ArCH 2 Cl(均成本<1美分/毫摩尔)以10 g规模制备。这些允许选择性地形成(否则无法获得的)更高溶解度的7-衍生物。相似的方法可用于制备萘[2,3- b:6,7- b' ]二噻吩2 使用同样低成本的原材料。