367967-44-0Relevant articles and documents
Amidines: Synthesis from o-alkenylanilines and cyclization in polyphosphoric acid
Gataullin,Afon'kin,Ahdrakhmanov,Tolstikov
, p. 545 - 547 (2001)
Condensation of 2-[(E)-pent-3-en-2-yl]-4-, 2-[(E)-pent-2-en-2-yl]-4-, or 2-(cyclopent-1-enyl)-6-methylaniline with 1-chloro-1-(N-methylimino)-or 1-chloro-1-(N-phenylimino)ethane affords the corresponding amidines. Cyclization of the N-methylimino derivatives in polyphosphoric acid gives 3,4-dihydroquinazolines in high yields.