HCID 19010007, compound → HCID 15148204, compound

Participants

Reaction Steps

In 12 0 ml of acetone containing 240 ml of 1N sodium hydroxide was dissolved 12 . 7 g of the dicyanoethyl 1,4-dihydro-2,4,6-trimethyl-3,5-pyridinedicarboxylate obtained in (1) above, and the solution was stirred at a room temperature for 2 hours. After the reaction, the reaction mixture was diluted with 240 ml of water and washed twice with dichloromethane. The separated aqueous layer was rendered acidic (pH=1-2) with concentrated hydrochloric acid under ice-cooling and stirred for 3 hours- The thus formed crystal was collected by suction filtration. The filtrate was dried under reduced pressure to yield 4.55 g (yield: 54%) of 1,4-dihydro- 2,4,6-trimethyl-3,5-pyridinedicarboxylic acid as a pale yellows powder.

Provenance & Evidence