The structure of arenol and homoarenol, α-pyrone derivatives from helichrysum arenarium (L.) moench
✍ Scribed by J. Vrkoč; L. Dolejš; P. Sedmera; S. Vašíčková; F. Šorm
- Publisher
- Elsevier Science
- Year
- 1971
- Tongue
- French
- Weight
- 233 KB
- Volume
- 12
- Category
- Article
- ISSN
- 0040-4039
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✦ Synopsis
Some time ago, we have reported isolation of the yellow pigment, m.p. 192-194O, analyzing C21H2407, from nbwers of the species Helichrysum arenarium CL.) MOENCHl 0 This report deals with the structure of this pigment. High resolution mass spectrometry revealed the pigment as a mixture of two compounds, '21H24'7 and '22'26'7' though it was not possible to separate the two closely related homologs. We propose the name arenol and the structural formula I of 3-[2,3,6-trihydroxy-4-acetyl-5-(3,3-dimethylallyl)benzyl)-4-hydroxy-5,6-dimethyl-2H-py~an--2-one for the lower homolog, and the name homoarenol and the structural formula II of 3-~2,3,6-trihydroxy-4-acety1-5-(3,3-dimethylallyl)benzyl]-4-hydroxy-5-methyl-6-ethyl-2H-pyran-2-one for the higher homolog.