I. Yavari et al., ONE-STEP SYNTHESIS OF DIALKYL 1,2-DIHYDROQUINOLINE-2,3-DICARBOXYLATES- A VINYLTRIPHENYLPHOSPHONIUM SALT MEDIATED INTRAMOLECULAR WITTIG REACTION, Journal of chemical research. Synopses, (6), 1997, pp. 208-209
Dialkyl 1,2-dihydroquinoline-2,3-dicarboxylates are formed in a one-po
t reaction from amide derivatives of 2-aminobenzaldehyde, dialkyl acet
ylenedicarboxylates and triphenylphosphine in CH2Cl2 in high yields.