Long-chain substituted chromones from two dianellinae

✍ Scribed by R.G. Cooke; J.G. Down

• Book ID: 104248760
• Publisher: Elsevier Science
• Year: 1970
• Tongue: French
• Weight: 131 KB
• Volume: 11
• Category: Article
• ISSN: 0040-4039
• DOI: 10.1016/s0040-4039(01)97901-8

✦ Synopsis

of petroleum extracts of roots of both Dianella revoluta and Stypandra -a series of compounds of general structure ( I 1, where R = C H 27 55 (n), C29H59(n), or C3,Hb3(nf. The compounds were characterised as a mixture of homologuea, and structures have been assigned on the basis of the evidence below. I 11 III Compounds ( I ) give an intense purple colour with ethanolic FeC13, as is typical for 5-hydroxychromones'. The homologues show absorption maxima at 232, 2$(sh), 260 and 301 tan, ( 1ogE 4.4, 4.25, 4.3 and 4.1 1, and minima at 244 and 276 mv ( log& 4.2 and 3.9 ). These values compare very closely with those for dihydropeuceniu ( II 1, but differ significantly from values for analogous 8-alkylchromones2.