The preparation of annulated 1,3-oxazoles from 1,3,2-oxazaphospholes and aldehydes

Article abstract of DOI:10.1007/s00706-015-1607-4

The reactions of 2,3-dihydro-2,2,2-triphenylphenanthro[9,10-d]-1,3,2-λ⁵-oxazaphospholes with aromatic aldehydes lead to the corresponding 2-substituted phenanthro[9,10-d][1,3]oxazoles via an aza-Wittig reaction in good yields.