| 摘要 |
The present disclosure provides colorant compounds and methods of isolation of the colorant compounds derived from a reaction of genipin and an amine. The colorant compositions comprise purified compounds (e.g., a purified polymer or a purified dimer) obtained from multiple fractioning by chromatography of the reaction resulting material. The purified polymer or dimer can be used as a colorant by itself or in combination with another colorant for imparting color to a food, a drug, a cosmetic, a medical device, and textile products. |
| 主权项 |
1. A colorant composition comprising a polymer of formula 4: a geometric isomer thereof, a tautomer thereof, or a salt thereof, wherein n is an integer from 2 to 20; wherein each A is independently selected from the group consisting of formula 5′A, formula 5′B, formula 5′C, a geometric isomer thereof, a tautomer thereof, a salt thereof, and a combination thereof: wherein: R1 is hydrogen, methyl, ethyl, propyl, isopropyl, butyl, sec-butyl, isobutyl, or tert-butyl; and wherein T1 is hydrogen or a methyl group; and T2 is hydrogen or A-T1, wherein A and T1 are defined above; wherein the colorant composition is substantially free of a first additional compound selected from the group consisting of formula 2′, formula 3′A, formula 3′B, a geometric isomer thereof, a tautomer thereof, and a salt thereof: |
