反应详情

A column was charged with 180 ml of a strongly acidic ion exchange resin (AMBERLITE IR120B Na, manufactured by Japan Organo). The ion exchange resin was used after converting it from sodium ion type to hydrogen ion type through hydrochloric acid treatment. Next, 20.00 g (119 mmol) of 5-aminolevulinic acid hydrochloride was dissolved in 1000 ml of ion exchange water and passed through said column, and then 1000 ml of ion exchange water was passed through the same. Next, 1 N aqueous ammonia was slowly passed through the same to collect 346 ml of yellow eluate. The thus collected eluate was added to 16 ml of 85% phosphoric acid (H3PO4 238 mmol) and concentrated using an evaporator. To the concentrated liquid, 400 ml of acetone was added, followed by vigorously stirring with a stirrer and then allowed to stand at 4° C. for 16 hours. The thus precipitated solid was recovered by suction filtration and washed with 500 ml of acetone. The thus obtained solid was dried under reduced pressure for 12 hours to obtain 23.04 g (101 mmol) of the substance of interest. Its physical property data are shown below.

1. additionA column was charged with 180 ml of a strongly acidic ion exchange resin (AMBERLITE IR120B Na, manufactured by Japan Organo)
2. customto collect 346 ml of yellow eluate
3. concentrationconcentrated
4. customan evaporator
5. additionTo the concentrated liquid, 400 ml of acetone was added
6. filtrationThe thus precipitated solid was recovered by suction filtration
7. washwashed with 500 ml of acetone
8. customThe thus obtained solid was dried under reduced pressure for 12 hours
9. customto obtain 23.04 g (101 mmol) of the substance of interest