G. Lowe et al., Racemisation and rearrangement of 1,2-dihydro-1,3,5-triazines: a novel reversible thermal electrocyclic reaction, CHEM COMMUN, (8), 2001, pp. 737-738
Chiral 1,2-diaryl-1,2-dihydro-4,6-diamino-1,3,5-triazines undergo facile ra
cemisation by a reversible thermal electrocyclic reaction mechanism; the tr
ansient intermediate can lead, after tautomerisation, to rearranged racemic
2-aryl-1,2-dihydro-4-amino-6-anilino-1,3,5-triazines.