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Dehydro-abietic acid.

ABSTRACT: THE TITLE COMPOUND [SYSTEMATIC NAME: (1R,4aS,10aR)-7-iso-prop-yl-1,4a-dimethyl-1,2,3,4,4a,9,10,10a-octa-hydro-phen-anthrene-1-carboxylic acid], C(20)H(28)O(2), has been isolated from disproportionated rosin which is obtained by isomerizing gum rosin with a Pd-C catalyst.. Two crystallographically independent mol-ecules exist in the asymmetric unit. In each mol-ecule, there are three six-membered rings, which adopt planar, half-chair and chair conformations. The two cyclo-hexane rings form a trans ring junction with the two methyl groups in axial positions. The crystal structure is stabilized by inter-molecular O-H?O hydrogen bonds.

SUBMITTER: Rao XP

PROVIDER: S-EPMC2970241 | biostudies-other | 2009

REPOSITORIES: biostudies-other

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Dehydro-abietic acid.

Rao Xiao-Ping XP Song Zhan-Qian ZQ Shang Shi-Bin SB

Acta crystallographica. Section E, Structure reports online 20090909 Pt 10

THE TITLE COMPOUND [SYSTEMATIC NAME: (1R,4aS,10aR)-7-iso-prop-yl-1,4a-dimethyl-1,2,3,4,4a,9,10,10a-octa-hydro-phen-anthrene-1-carboxylic acid], C(20)H(28)O(2), has been isolated from disproportionated rosin which is obtained by isomerizing gum rosin with a Pd-C catalyst.. Two crystallographically independent mol-ecules exist in the asymmetric unit. In each mol-ecule, there are three six-membered rings, which adopt planar, half-chair and chair conformations. The two cyclo-hexane rings form a tran ...[more]

PMID: 21577865

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