HCID 10685532, compound → HCID 18387246, compound

Participants

Reaction Steps

In place of diethyl 5-methyl-4-phenyl-2,3-pyridinedicarboxylate in Step 1 in Reference Example 33, diethyl 4-phenyl-2,3-pyridinedicarboxylate (see Japanese Patent Laid-Open No. 62-106081) was reacted and treated in the same manner as in Step 1 in Reference Exaple 33, to obtain 4-phenyl-2,3-pyridinedicarboxylic acid as pale yellow crystals. m.p. 146-148° C. (recrystallized from THF-isopropyl ether) NMR(200 MHz, CDCl3 +DMSO-d6) ppm: 7.3-7.6(6H,m), 8.69(1H,d,J=5.0 Hz)

Provenance & Evidence