Structure of rhodocladonic acid. X-ray crystal structure analysis of its triacetate

…, JF Sawyer, CJ Webster, W Wong-Ng

Index: McLean, Stewart; Mahler, Paul; Nyburg, Stanley C.; Sawyer, Jeffery F.; Webster, Colin J.; Wong-Ng, Winnie Canadian Journal of Chemistry, 1983 , vol. 61, p. 2055 - 2058

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Citation Number: 2

Abstract

The structure of the lichen pigment rhodocladonic acid, 2-acetyl-3, 4, 6-trihydroxy-7- methoxynaphtho [2, 3-b] furan-5, 8-dione (1 a), has been assigned on the basis of an X-ray crystal structure analysis of its triacetate (1 c). Crystals of the triacetate are triclinic, space group with cell dimensions a= 13.609 (3) Å, b= 15.009 (3) Å, c= 5.456 (2) Å, α= 106.66 (4)°, β= 103.45 (3)°, γ= 72.30 (4)°, U= 1004 (1) Å and D calc= 1.47 g cm-3 for Z= 2; R 1= 0.0505 ...