125115-14-2Relevant academic research and scientific papers
Generation and intramolecular cyclization of α-phenylsulfonyl and α-alkylsulfonyl radicals
Tsai, Yeun-Min,Chang, Fu-Chang,Huang, Jimin,Shiu, Chi-Lung,Kao, Chai-Lin,Liu, Jyh-Shiunn
, p. 4291 - 4308 (2007/10/03)
α-Phenylsulfonyl radicals are generated by the reaction of diphenyl dithioacetals or phenyl α-chlorosulfides with tributyltin hydride. Alkyl phenyl dithioacetals react selectively with tributyltin hydride to give α-alkylsulfonyl radicals. 5-Exo-type of intramolecular cyclizations of these radicals are studied. The cyclization is most successful when the olefin is terminally substituted with an ester group. The cis/trans ratio of the cyclized product varies according to the reaction rates. With a faster cyclization, cis-isomer is the major product. A slower cyclization gives more trans-product.
Generation and intramolecular cyclization of α-sulfinyl and α-sulfonyl radicals
Ke, Bor-Wen,Lin, Chao-Hsiung,Tsai, Yeun-Min
, p. 7805 - 7826 (2007/10/03)
α-Phenylsulfinyl and α-Phenylsulfonyl radicals are generated by the reactions of α-chlorosulfoxides and α-chlorosulfones with tributyltin hydride, respectively. High reaction concentration (0.2 M) is required to ensure efficient generations of these radic
THE STUDY OF INTRAMOLECULAR FREE RADICAL CYCLIZATION OF α-SULFENYL RADICAL
Tsai, Yeun-Min,Chang, Fu-Chang,Huang, Jimin,Shiu, Chi-Lung
, p. 2121 - 2124 (2007/10/02)
α-Sulfenyl radical can be generated from α-chlorosulfide or dithioacetal.The olefin substituent effect on the intramolecular radical cyclization of this type was studied.
