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Tang W, Harada K, Kubo M, Hioki H, Fukuyama Y. Eight New Clerodane Diterpenoids from the Bark of Ptychopetalum olacoides. Nat Prod Commun 2011. [DOI: 10.1177/1934578x1100600305] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Eight new clerodane type diterpenoids, named 7-oxo-kolavelool (1), 7α-hydroxykolavelool (2), 6α,7α-dihydroxykolavenol (3), 12-oxo-hardwickiic acid (4), ptycholide I (5), ptycholide II (6), ptycholide III (7), and ptycholide IV (8) were isolated from the MeOH extract of the bark of a Brazilian medicinal plant, Ptychopetalum olacoides. The structures of 1–8 were elucidated by analyzing spectroscopic data and by comparing their NMR data with those of the previously reported compounds kolavelool (1a), kolavenol (3a), hardwickiic acid (4a), and ptychonolide (5a). Compounds 5 and 6 existed as a 1:1 mixture of inseparable epimers at C-15.
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Affiliation(s)
- Wanxia Tang
- Faculty of Pharmaceutical Sciences, Tokushima Bunri University, Tokushima 770-8514, Japan
- Department of Pharmacy Engineering, College of Chemistry and Chemical Engineering, Qiqihar University, 42 Wenhuadajie, Qiqihar, Heilongjiang Province, 161006, China
| | - Kenichi Harada
- Faculty of Pharmaceutical Sciences, Tokushima Bunri University, Tokushima 770-8514, Japan
| | - Miwa Kubo
- Faculty of Pharmaceutical Sciences, Tokushima Bunri University, Tokushima 770-8514, Japan
| | - Hideaki Hioki
- Faculty of Pharmaceutical Sciences, Tokushima Bunri University, Tokushima 770-8514, Japan
| | - Yoshiyasu Fukuyama
- Faculty of Pharmaceutical Sciences, Tokushima Bunri University, Tokushima 770-8514, Japan
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Taschner MJ, Cyr PT. Synthesis of tricyclo[6.2.2.01,6]Dodeca-6,9-dienes. An approach to clerodane diterpenes. Tetrahedron Lett 1990. [DOI: 10.1016/s0040-4039(00)98054-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Apsimon JW, Yamasaki K. A SYNTHETIC APPROACH TOWARDS THE CLERODANE DITERPENOIDS, A VERSATILE SYNTHON. CHEM LETT 1977. [DOI: 10.1246/cl.1977.1453] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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The stereochemistry of stachysolone. Chem Nat Compd 1972. [DOI: 10.1007/bf00564591] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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