3-Cyanophenylboronic acid → tert-butyl 5-(3-cyanophenyl)-2H-1,4-oxazine-4(3H)-carboxylate

Participants

Reaction Steps

This compound was prepared from tert-butyl 5-((diphenoxyphosphoryl)oxy)-2H-1,4-oxazine-4(3H)-carboxylate and 3-cyanophenylboronic acid using a procedure similar to that described in Example 2 (Steps 1-3a) above. The product was isolated as an off-white solid (63% yield); 1H-NMR (d6-DMSO) 1.08 (9H, s), 3.69 (2H, t), 4.12 (2H, t), 6.61 (1H, s), 7.50-7.52 (2H, m), 7.62-7.66 (2H, m); MS ES(+) 231.0 (M+-tBu). IR λmax=2225, 1697 cm−1

Provenance & Evidence