201-69-4Relevant academic research and scientific papers
Phenyl migration to thiophene ring in photolysis of 1-phenylbenzo[b]thiophenium salts
Kitamura, Tsugio,Morizane, Kunihiko,Taniguchi, Hiroshi,Fujiwara, Yuzo
, p. 5157 - 5160 (2007/10/03)
Photolysis of 1-phenylbenzo[b]thiophenium salts was conducted by use of a Pyrex-filtered high pressure Hg lamp. The major products in most cases were the phenyl-migrated ones, i.e., 2-phenylbenzo[b]thiophenes and 3-phenylbenzo[b]thiophenes, together with the dephenylated benzo[b]thiophenes. This photochemical behavior is quite different from the thermal ones that provide the ring-opened olefins. The selective phenyl migration to the thiophene ring and the absence of the ionic products are characteristic of benzothiophenium systems.
EXCLUSIVE CYCLIZATION AT SULFUR IN PHOTOLYSIS OF β-VINYL BROMIDES
Kitamura, Tsugio,Kawasato, Hironobu,Kobayashi, Shinjiro,Taniguchi, Hiroshi
, p. 839 - 842 (2007/10/02)
Photolysis of β-vinyl bromides, in contrast to the oxy-derivatives, resulted in exclusive cyclization at sulfur to give 1-benzothiophenes.The results were discussed by the nature of sulfur.
Benzothiophene S-Oxides and Related Compounds from the Reactions of Arylalkynes and Antimony Pentafluoride in Sulfur Dioxide
Fan, Ru-Lin,Dickstein, Jerome I.,Miller, Sidney I.
, p. 2466 - 2469 (2007/10/02)
When treated with antimony pentafluoride and benzene in liquid sulfur dioxide, certain alkynes yield 2-X-3-phenylbenzothiophene S-oxides (X = Ph, Cl, Br) or 1,1-diphenyl-2-X-vinylsulfinic acids (X = H, Br).Though limited, this is a facile route to both types of compounds.
