Synthesis of 1,2,3-Benzotriazine-4(3H)-ones
An oxidative rearrangement of 3-aminoindazoles provides diversely functionalized 1,2,3-benzotriazine-4(3H)-ones in good yields at room temperature. Water as cosolvent facilitates the halogen-induced ring expansion of 3-aminoindazoles under oxidative conditions.
Y. Zhou, Y. Wang, Y. Lou, Q. Song, Org. Lett., 2018, 20, 6494-6497.
A Pd(0) catalyzed carbonylative annulation reaction of 1-(2-iodophenyl)-3-aryltriaz-1-enes gave the corresponding 3-arylbenzo-1,2,3-triazin-4(3H)-ones with high selectivity and in excellent yields in the presence of 1 atm of carbon monoxide, whereas 1-aryl-(1H)-benzo-1,2,3-triazoles are provided in good yields in the presence of catalytic amounts of PPh3.
A. Chandrasekhar, S. Sankararaman, J. Org. Chem., 2017, 82, 11487-11493.