How stable are 1,2-dihydro-1,2-azaborines toward water and oxygen?

The stability of 1,2-dihydro-1,2-azaborines toward oxygen and water was investigated as a function of their ring substituents: while generally 1,2-dihydro-1,2-azaborines are compatible with water, their stability toward oxygen is dependent on the boron and the C(3) substituents, and we found that electron withdrawing groups enhanced the heterocycle's ability to resist oxidative degradation.