作者:Matthew Badland、Alison Cleeves、Harry G. Heller、David S. Hughes、Michael B. Hursthouse
DOI:10.1039/b002033h
日期:——
Thiofulgides 1, (X = S) cyclise on irradiation with UV light
to form thermally stable photochromes 2, (X = S) that absorb at much longer
wavelengths than photochromes 2, (X = O), formed from corresponding
fulgides 1, (X = O), reverse reactions occur on exposure to white light;
photochromic thiofulgides are prepared by reaction of fulgides with sodium
hydrosulfide in hot toluene and photochromic lactones 9 and 12 are prepared
by reaction of fulgides with sodium hydrosulfide in cold methanol followed
by cyclisation with a carbodiimide.
硫代氟化物1(X = S)在紫外线照射下环化,形成热稳定的光致变色体2(X = S),其吸收波长比光致变色体2(X = O)长得多,光致变色体2(X = O)由相应的硫代氟化物1(X = O)形成,在白光照射下发生逆反应;光致变色硫代氟化物通过氟化物与热甲苯中的氢化硫钠反应制备,光致变色内酯9和12通过氟化物与冷甲醇中的氢化硫钠反应制备,随后与碳二亚胺环化。