反应详情

The column is washed with 80 l of water, followed by passage of 240 l of 0-10% EtOH at SV=1.0 (80 l/hr.). The eluate is collected in 8 l fractions which are assayed by HPLC. The HPLC gives an elution curve corresponding to the first half of the attached drawing. It is clear that D-CPC and DA-CPC are eluted in two distinct patterns. A further amount of 10% EtOH may be passed to elute CPC but in order to save on the elution time and obtain a better-defined elution curve, the eluant is replaced with 20% EtOH and the eluate is collected in 8 l fractions. As assayed by HPLC, there is obtained an elution curve corresponding to the second half of the drawing. Each fraction is applied to a thin-layer chromatoplate of microcrystalline cellulose powder (Tokyo Kasei K.K. Japan) and the chromatogram is developed with n-butanol-acetic acid-water (3:1:1, V/V), and dried in air. The image formed by color-reaction with ninhydrin shows a spot each at Rf=0.15 for D-CPC, RF=0.28 for CPC and Rf=0.30 for DA-CPC.

1. washThe column is washed with 80 l of water
2. customThe eluate is collected in 8 l fractions which
3. customThe HPLC gives an elution curve corresponding to the first half of the attached drawing
4. washare eluted in two distinct patterns
5. washto elute CPC
6. customobtain a better-defined elution curve
7. customthe eluate is collected in 8 l fractions
8. customthere is obtained an elution curve corresponding to the second half of the drawing
9. customdried in air