92962-39-5Relevant articles and documents
New pathway to the synthesis of substituted 4H-3,1-benzoxazines
Mochalov,Gazzaeva,Fedotov,Shabarov,Zefirov
, p. 794 - 801 (2003)
The intramolecular rearrangement of N-acyl-2-cyclopropylanilines by the action of protic acids gives substituted 4H-3,1-benzoxazines. The reaction proceeds in high yield through the formation of benzoxazine precursors, namely, the corresponding 3,1-benzoxazinium ions, which are stable in acid solution. N-Acylamino-2-alkenylbenzenes, in which the double bond of the alkyl chain is conjugated with the benzene ring, are capable of undergoing a similar rearrangement.
