... Volume: Page: Digital Object Identifier (DOI). ... J. Org. Chem. ... b The product was 5h. Table 4. Effect of Reaction Temperature a. entry, triflate, temp, °C, time, yield, %. 1, La, 100, 30 min, 68. 2, Yb, 100, 10 min, 59. 3, Sc, 100, 10 min, 57. ...