1: 70 percent / syn-4-nitrobenxaldoxime, N1,N1,N3,N3-tetramethylguanidine / dioxane; H2O / 16 h / 20 °C 2: 95 percent / tetrabutylammonium fluoride / tetrahydrofuran / 2 h / 20 °C View Scheme

1: 75 percent / ammonia / tetrahydrofuran 2: 96 percent / tetrabutylammonium fluoride / tetrahydrofuran / 20 °C View Scheme

1: 80 percent / triethylamine / ethanol / 72 h / 20 °C 2: 95 percent / tetrabutylammonium fluoride / tetrahydrofuran / 20 °C View Scheme