Fig. 3: Detailed study on the allylboronates.

aConditions: Reactions were performed with ketone 1a (0.2 mmol), benzhydrazide 2a (1.2 equiv.), allylboronate (1.5 equiv.) and set of catalysts (5.0 mol%) with water (2.0 mL: 10 L/mol (1a)) and PhMe (5.0 equiv.) at 60 °C for 24 h. bYields were determined by 1H NMR analysis using 1,3,5-trimethoxybenzene as internal standard. cn.d. = not detected. Bz = benzoyl; Et = ethyl.