New deconjugation reaction of ( E )-1-indanylidene methylarene brought by photolysis with protic acid

Mechanistic insights into the thermal transformations of heterocyclic o-distyrylbenzenes: an experimental and computational study

“…1 Their preparation is relatively simple, 2 and with their extended delocalization of p electrons in the excited state they can induce new properties and the formation of new complex structures, difficult to prepare by the classical synthetic procedure. 3 In addition to well-known photochemical transformations of distyrylbenzenes, [4][5][6][7][8][9][10][11][12][13] over the past years, their thermal transformations in neutral and acidic [14][15][16][17][18][19] were also studied. 20 While thermal reaction in neutral medium did not indicate significant reactivity, acidic conditions can cause protonation of the double bond and the formation of new intramolecular products.…”

Photochemical and Thermal Transformations of Thiophene o-Distyrylbenzene Analogues in Acidic Media

“…This type of ring closure, and the existence of the 2.3-dihydronaphthalene intermediates, has not been detected before in o-distyryl benzenes [17][18][19][20][21][22][23] or their diheteroaryl substituted o-divinylbenzenes. 8,12 Stimulated by the Tong-Ing Ho's work [24][25][26][27][28][29] on photochemical behavior of styryl-furans and -thiophenes, who found that their photoreactivity could be entirely changed in acidic media. We report herein the photochemical and thermal behavior of dithiophene substituted o-divinylbenzenes 1 and 2 in acidic media.…”