P. Murugan et al., REACTION OF MALONONITRILE WITH ENONES, Indian journal of chemistry. Sect. B: organic chemistry, including medical chemistry, 37(8), 1998, pp. 737-741
Reaction of Malononitrile with xanthenes la,b and alpha,beta-unsaturat
ed carbonyl compounds 3a-e furnishes the acridines 2a,b and biphenyl d
erivatives 4a-d,5. The biphenyl 4a shows lasing and non-linear optical
(NLO) properties.