... The Journal of Organic Chemistry. ... J. Org. Chem. ... Experimental Section. General Experimental Procedures 1 H NMR and 13 C NMR were obtained at 400 and 100 MHz respectively, with CDCl 3 (for compound 2) and DMSO-d 6 (for entries 1, 2, 4–11, Table 2) as solvents. ...