Synthesis of New Sulfur Heteroaromatics Isoelectronic with Dibenzo[<i>g</i>,<i>p</i>]chrysene by Photocyclization of Thienyl- and Phenyl-Substituted Ethenes
作者:Erik Fischer、Jan Larsen、Jørn B. Christensen、Marc Fourmigué、Hans G. Madsen、Niels Harrit
DOI:10.1021/jo960022x
日期:1996.1.1
A series of new sulfur heteroarenes, isoelectronic with dibenzo[g,p]chrysene, have been prepared by double photocyclization of the corresponding tetraaryl substituted ethenes. The first step proceeds efficiently in each case, and the corresponding intermediate sulfur heteroarenes, isoelectronic with phenanthrene, have been isolated. The second ring closure is only efficient when one of the participating
通过对相应的四芳基取代的乙烯进行双光环化反应,制备了一系列与二苯并[g,p]丙烯等电子的新型硫杂芳烃。第一步在每种情况下均有效进行,并且已分离出与菲等电子的相应中间体硫杂芳烃。仅当参与的芳基取代基之一是噻吩基时,第二个闭环才有效,因此,在激发单线态反应中所涉及的碳原子上表现出更高的电子密度。大多数新化合物在普通溶剂中的溶解度极低,并且没有显示出在杂芳族化合物中通常发现的改善的电子给体性能。