Absolute configuration of isoeichlerialactone

作者：Fun Hoong Kun^*; Joycharat Nantiya; Voravuthikunchai Supayang Piyawan; Chantrapromma Suchada

来源：Acta Crystallographica Section E-Structure Reports Online, 2010, 66: O879-U2727.

DOI：10.1107/S1600536810009499

The title seco-dammarane triterpenoid,C(27)H(42)O(4) (systematic name: 3-{(3S,3aR,5aR,6S,7S,9aR,9bR)-6,9a,9b-trimethyl-3[(R)-2-methyl-5-oxotetrahydrofuran-2-yl]-7-(prop-1-en-2-yl)dodecahydro-1H-cyclopenta[a]naphthalen-6-yl}propanoic acid),has been isolated for the first time from the seeds of Aglaia forbesii. The molecule has three fused rings and all rings are in trans-fused. The two cyclohexane rings are in standard chair conformations and the cyclopentane ring adopts an envelope conformation. Its absolute configuration was determined by the refinement of the Flack parameter to 0.26 (17). In the crystal,molecules are linked into chains along [010] by O-H center dot center dot center dot O hydrogen bonds.

• 出版日期2010-4