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Pascual C, Simon W. Regel zur Abschätzung der Aciditätskonstanten von Cyclohexancarbonsäuren. Teil II. Helv Chim Acta 2004. [DOI: 10.1002/hlca.19640470234] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Sommer PF, Pascual C, Arya VP, Simon W. Regel zur Abschätzung der Aciditätskonstanten von Cyclohexancarbonsäuren. Helv Chim Acta 2004. [DOI: 10.1002/hlca.19630460528] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Affiliation(s)
- Feng-Peng Wang
- Department of Chemistry of Medicinal Natural Products, West China College of Pharmacy, Sichuan University, Chengdu 610041, P. R. China
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Wang FP, Liang XT. Chapter 3 Chemistry of the Diterpenoid Alkaloids. ACTA ACUST UNITED AC 1992. [DOI: 10.1016/s0099-9598(08)60061-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/12/2023]
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Gokhale P, Joshi A, Sahni R, Naik V, Damodaran N, Nayak U, Dev S. Photochemical transformations—I. Tetrahedron 1976. [DOI: 10.1016/0040-4020(76)85016-8] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Taticchi A, Fringuelli F, Mancini V. Synthesis of two stereoisomers of (±)-9-desoxocassamic acid. Tetrahedron 1969. [DOI: 10.1016/s0040-4020(01)83034-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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9
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Misra R, Pandey R, Dev S. The absolute stereochemistry of hardwickiic acid and its congeners. Tetrahedron Lett 1968. [DOI: 10.1016/s0040-4039(00)89672-0] [Citation(s) in RCA: 33] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Abstract
Evidence is presented that the fully reduced derivatives of pimaric acid (I), sandaracopimaric acid (II), and isopimaric acid (III) have trans–anti–trans fused skeletons. The implications of this observation are discussed.
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Pelletier SW. The chemistry of certain imines related to the diterpene alkaloids. EXPERIENTIA 1964; 20:1-10. [PMID: 5321834 DOI: 10.1007/bf02146010] [Citation(s) in RCA: 32] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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Abstract
A stereospecific hydration of the exocyclic methylene group of a derivative of the alkaloid atisine has been observed. The product was used to degrade the alkaloid to a tetracyclic phenol. This enabled rigorous proof of the structure and relative and absolute stereochemistry of atisine and related alkaloids. A detailed explanation of the abnormal basic strength and the isomerization of atisine is given. Long-range influence of polar groups on the basic strength of derivatives of the alkaloid is reported.
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ApSimon JW, Edwards OE. A NEW PHOTOCHEMICAL REACTION: THE STRUCTURE AND ABSOLUTE STEREOCHEMISTRY OF ATISINE. CAN J CHEM 1962. [DOI: 10.1139/v62-136] [Citation(s) in RCA: 57] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Irradiation of azides of diterpenoid acids with 1α- and 1β-carboxyl groups gave the corresponding isocyanates and ca. 25% yields of lactams. The azide of hexanoic acid under comparable conditions gave 8% of hexanamide. The reaction has been used to convert podocarpic acid to the enantiomer of the phenol III derived from atisine. This completes the structure proof of the atisine family of alkaloids, the Garrya alkaloids, and related diterpenes, and proves the absolute stereochemistry of these substances.
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The low strength of highly hindered aromatic carboxylic acids. Tetrahedron Lett 1962. [DOI: 10.1016/s0040-4039(00)70583-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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