... The Journal of Organic Chemistry. ... Furthermore 1 J H - C values for C-8 and C-2 of 3 are very different at 208 and 233 Hz, respectively, which reflects the published values for isoxazole 14 (203 Hz) and 1,3-benzoxazole 15 (233 Hz) ring carbons. ...
[Katritzky, Alan R.; Wang, Zuoquan; Hall, C. Dennis; Akhmedov, Novruz G.; Shestopalov, Aleksandr A.; Steel, Peter J. Journal of Organic Chemistry, 2003 , vol. 68, # 23 p. 9093 - 9099]