A nucleophilic N-alkylation of 2-oxobenzoxazine-2-carboxylates with organozinc reagents
with good selectivities and in moderate to good yields is described. Moreover, the
synthesis of multisubstituted 1,4-dihydrobenzoxazine-2-ones bearing a tetrasubstituted
carbon atom via a one-pot N-alkylation/C-alkylation reactions is reported.
Key words
dihydrobenzoxazinone - umpolung - zinc - tetrasubstituted carbon - one-pot reaction
- cyclic α-imino esters