Haemocorin aglycone

Haemocorin aglycone see phenalenones. Haemofluorone A see phenalenones. Haemoventosin. 

Haemocorin aglycone purple-red plates or almost black needles 277—278° (230—232°)... 

Dihydroxy-5-methoxy-9-phenyl-l H-phenalen-1-one (Haemocorin aglycone)... 

The most generally useful data for structure elucidation have been provided by very comprehensive studies of the proton magnetic resonance spectra of the natural arylphenalenones and the related metabolites, together with a large number of synthetic model compounds. As shown for structures (54) and (55) the H-NMR spectra (6 values in CDCI3) easily distinguish between the dimethyl ethers obtained from 2,6-di-hydroxy-5-methoxy-9-phenyl-1 H-phenalen-1 -one (haemocorin aglycone). 

The application of the above reactions is illustrated in Scheme VIII by the synthesis of 2,6-dihydroxy-5-methoxy-9-phenyl-IH-phenalen-I-one (haemocorin aglycone) (59). 

Laundon, B., and G. A. Morrison Naturally Occurring Compounds Related to Phenalenone II. The Synthesis of Haemocorin Aglycone. J. Chem. Soc. (London) C. 1694 (1971). 

Perinaphthenones.— The biosynthesis of haemocorin aglycone, a pigment of Haemodorum corymbosum, was mentioned in last year s Report. Edwards et alV have shown that a very closely similar pigment, lachnanthoside (58), is formed in Lachnanthes tinctoria, by precisely the same general route, i.e. from phenylalanine, tyrosine, and acetic add, the acetate carboxy-group bdng... 

Diketide products of this super family of plant polyketide synthases probably include acridones and also phenylphenalenones such as the aglycone of haemocorin (69), which may be formed from one malonyl-CoA and two phenylpropanyl-CoA units (Figure 8). The proposed derivation of 69 via a diarylheptanoid related to curcumin (70) was... 

Cooke, R. G., and I. J. Rainbow Colouring Matters of Australian Plants XIX. Haemocorin Unequivocal Synthesis of the Aglycone and Some Derivatives. Austral. J. Chem. 30, 2241 (1977). 

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