Decomposition of Usnic Acid. VII. Pyrolysis of Dihydrousnic Acid. (3). Isodihydrousnic Acid.

スポンサーリンク

概要

• 論文の詳細を見る

• The structure of (+) isodihydrousnic acid (IDHU), C_<18>H_<18>O_7,m.p. 128°, [α]_D+57.5°, which was obtained from (-) dihydrousnic acid (DHU), C_<18>H_<18>O_7,m.p. 149°, [α]_D-86.8°, by heating above 200°was studied. IDHU was separated from DHU by recrystallization from MeOH or by paper electrophoresis. DHU and IDHU were distinguished by their Cu-complex salts which gave markedly different optical rotation. DHU and IDHU are interconvertible to form an equilibrium mixture in pyridine or in aq. alkaline solution, which showed an equilibrium value of optical rotation. The former suggestion that DHU and IDHU would be cis-trans isomers at B/C ring fusion has now been revised. The N.M.R. spectra showed a cis-ring fusion in both DHU and IDHU. The chemical and N.M.R. spectral studies of DHU, IDHU and their model compounds resulted that a rearrangement of A-ring occurs by the cleavage of B-ring in the course of interconversion of DHU and IDHU. The N.M.R. spectra of IDHU showed that it exists in an equilibrium state of different situation of hydrogen bonding, which is represented as in the formulas (A) and (B).

• 公益社団法人日本薬学会の論文
• 1962-06-25

著者

• 庄司 順三

  School of Pharmaceutical Sciences, Showa University

• 庄司 順三

  School Of Pharmaceutical Sciences Showa University

• 庄司 順三

  Faculty of Pharmaceutical Sciences, Showa University

関連論文

• Six New Triterpenoidal Glycosides Including Two New Sapogenols from Albizziac Cortex. V
• 生薬エキスの生体影響に関する毒性学的研究 : 芍薬, 桃仁, 当帰および川〓
• Alanysis of Saponins of Wild Panax gineseng
• Effect of Ginseng Saponins on Cholesterol Metabolism. II. Effect of Ginsenosides on Cholesterol Synthesis by Liver Slice
• Stimulation of Serum Protein Synthesis in Ginsenoside Treated Rat
• Effect of Ginseng Saponins on Nuclear Ribonucleic Acid (RNA) Metabolism. I. RNA Synthesis in Rats treated with Ginsenosides
• Effect of Ginseng Saponins on Cholesterol Metabolism. I. The Level and the Synthesis of Serum and Liver Cholesterol in Rats treated with Ginsenosides
• ACHYRANTHOSIDES C AND D, NOVEL GLUCURONIDE SAPONINS FROM ACHYRANTHES FAURIEI ROOT
• Studies on the Constituents of the Bark of Kalopanax pictus NAKAI
• Studies on the Constituents of Palmae Plants. III. : The Constituents of Chamaerops humilis L. and Trachycarpus wagnerianus BECC.
• Comparative Studies on the Constituents of Ophiopogonis Tuber and Its Congeners. IV. Studies on the Homoisoflavonoids of the Subterranean Part of Ophiopogon ohwii OKUYAMA and O. jaburan (KUNTH) LODD.
• Study on Saponins of Rhizomes of Panax pseudo-ginseng subsp. himalaicus Collected at Tzatogang and Pari-la, Bhutan-Himalaya
• Studies on the Constituents of Palmae Plants. II. The Constituents of Rhapis exelsa HENRY and R. humilis BL.
• Comparative Studies on the Constituents of Ophiopogonis Tuber and Its Congeners. III. Studies on the Constituents of the Subterranean Part of Ophiopogon ohwii OKUYAMA and O. jaburan (KUNTH) LODD.
• Studies on the Constituents of Palmae Plants. I. The Constituents of Trachycarpus fortunei (HOOK.) H. WENDL. (1)
• Comparative Studies on the Constituents of Ophiopogonis Tuber and Its Congeners. II. Studies on the Constituents of the Subterranean Part of Ophiopogon planiscapus NAKAI. (1)
• Comparative Studies on the Constituents of Ophiopogonis Tuber and Its Congeners. VI. : Studies on the Constituents of the Subterranean Part of Liriope spicata var. prolifera and L. muscari. (1)
• ツルニンジン(Codonopsis lanceolata TRAUTV.)の組織培養による再分化植物の育成
• Comparative Studies on the Constituents of Ophiopogonis Tuber and Its Congeners. VIII. Studies on the Glycosides of the Subterranean Part of Ophiopogon japonicus KER-GAWLER cv. Nanus. (2)
• Comparative Studies on the Constituents of Ophiopogonis Tuber and Its Congeners. VII. Studies on the Homoisoflavonoids of the Subterranean Part of Ophiopogon japonicus KER-GAWLER cv. Nanus. (1)
• Potentiation of Nerve Growth Factor-Mediated Nerve Fiber Production in Organ Cultures of Chicken Embryonic Ganglia by Ginseng Saponins : Structure-Activity Relationship
• Studies on the Constituents of Panacis Japonici Rhizoma. V. The Structures of Chikusetsusaponin I, Ia, Ib, IVa and Glycoside P_1
• Studies on the Constituents of Himalayan Ginseng, Panax pseudoginseng. II. The Structures of the Saponins (2)
• Studies on the Saponins of Ginseng. II. Structures of Ginsenoside-Re, -Rf and -Rg_2
• Studies on the Saponins of Ginseng. I. Structures of Ginsenoside-Ro, -Rb_1,-Rb_2,-Rc and -Rd
• Studies on the Constituents of Himalayan Ginseng, Panax pseudoginseng. I. The Structures of the Saponins. (1)
• Studies on the Constituents of Panacis Japonici Rhizoma. IV. The Structure of Chikusetsusaponin V
• Studies on the Constituents of Panacis japonici Rhizoma. III. The Structure of Chikusetsusaponin. III.
• Inhibitors of Cyclic AMP Phosphodiesterase in Panax ginseng C. A. MEYER and Panax japonicus C. A. MEYER
• Comparative Studies on the Constituents of Ophiopogonis Tuber and Its Congeners. I. Studies of the Constituents of the Subterranean Part of Liriope platyphylla WANG et TANG. (1)
• Studies on the Constituents of Ophiopogonis Tuber. IV. On the Structures of Ophiopogonin A, B', C, C', and D'
• Studies on the Saponins of the Root of Platycodon grandiflorum A. DE CANDOLLE. I. Isolation and the Structure of Platycodin-D
• Studies on the Constituents of Aspidistra elatior BLUME. I. On the Steroids of the Underground Part
• Studies on the Saponins of Ginseng. IV. On the Structure and Enzymatic Hydrolysis of Ginsenoside-Ra_1
• Effect of Ginseng Saponins on Cholesterol Metabolism. III. Effect of Ginsenoside-Rb_1 on Cholesterol Synthesis in Rats fed on High-fat Diet
• Studies on the Saponins of Ginseng. III. Structures of Ginsenoside-Rb_3 and 20-Glucoginsenoside-Rf
• Mass Spectra of Trimethylsilyl Ethers of Dammarane-Type Ginseng-Sapogenins and Their Related Compounds
• Comparative Studies on the Constituents of a Parasitic Plant and Its Host. III. On the Constituents of Boschniakia rossica FEDTSCH. et FLEROV.(2)(Pharmacognosy,Chemical)
• Constituents of Chinese Crude Drug "Wujiapi." I. Studies on the Aglycones of Steroidal Glycosides of Pei-wujiapi. (1)
• Studies on the Chemical Constituents of Chinese Drug "Wujiapi"
• Decomposition of Usnic Acid. VI. Studies on the Ozonolytic Products of O, O-Diacetylusnic Acid.
• エゾウコギの栽培研究-2-発芽と育苗について
• エゾウコギの栽培研究-1-後熟と休眠打破について-1-
• トウキAngelica acutiloba Kitagawaの栽培に関する研究-2-芽くり苗の大きさが生育に及ぼす影響
• トウキAngelica acutiloba Kitagawaの栽培に関する研究-1-芽くりの改良法について
• Studies on Chemical Constituents of Antitumor Fraction from Periploca sepium. II. : Structures of New Pregnane Glycosides, Periplocosides A, B and C
• Studies on the Constituents of Ophiopogonis Tubers. VII. Synthetic Studies of Homoisoflavonoids. (3)
• Studies on the Constituents of Ophiopogonis Tuber. VI. Structures of Homoisoflavonoids. (2)
• Studies on the Constituents of Ophiopogonis Tuber. V. Isolation of a Novel Class of Homoisoflavonoids and Determination of Their Structures (1)
• Inhibitors of Cyclic Adenosine Monophosphate Phosphodiesterase in Polygala tenuifolid
• Amino Acid Sequences of the Amino-and Carboxyl-Terminal and Reactive Serine Regions of Carboxypeptidase C_
• Studies on the Constituents of Senegae Radix. III. The Structures of Senegin-III and -IV, Saponins from Polygala senega LINNE var. latifolia TORRY et GRAY.
• Studies on the Constituents of Senegae Radix. II. The Structure of Senegin-II, a Saponin from Polygala senega LINNE var. latifolia TORRY et GRAY
• On the Structure of Senegin-III of Senegae Radix
• On the Structure of Senegin-II of Senegae Radix
• Studies on the Constituents of Boschniakia rossica FEDTSCH. et FLEROV. I. Isolation and Structures of New Phenylpropanoid Glycosides, Rossicasides B, C and D
• Studies on the Constituents of Asparagi Radix. I. On the Structures of Furostanol Oligosides of Asparagus cochinchinensis (LOUREIO) MERRILL
• The Structures of Platycodin A and C, Monoacetylated Saponins of the Roots of Platycodon grandiflorum A. DC.
• Studies on the Constituents of Ophiopogonis Tuber. III. On the Structure of Ophiopogonin D
• Studies on the Constituents of Ophiopogonis Tuber. II. On the Structure of Ophiopogonin B
• Studies on the Constituents of Palmae Plants. VI. Steroid Saponins and Flavonoids of Leaves of Phoenix canariensis hort. ex CHABAUD, P. humilis ROYLE var. hanceana BECC., P. dactylifera L., and Licuala spinosa WURMB.
• Studies on the Constituents of Palmae Plants. V. Steroid Sapnins and Flavonoids of Leaves of Phoenix rupicola T. ANDERSON, P. loureirii KUNTH, P. reclinate N. J. JACQUIN, and Arecastrum remanzoffianum BECCARI
• Studies on the Constituents of Palmae Plants. IV. : The Constituents of the Leaves of Sabal causiarum BECC.
• Constituents of the Chinese Crude Drug "Wujiapi". IX. Structure of Glycoside H_2,a Potentiator of NGF-mediated Nerve Fiber Outgrowth
• Studies on the Constituents of Phytolaccaceous Plants. I. On the Structures of Phytolaccasaponin B, E and G from the Roots of Phytolacca americana L.
• Constituents of Chinese Crude Drug "Wujiapi."VVIII. On the Structures of New Oligosaccharides C_1,D_2,F_1 and F_2 of Bei-Wujiapi
• Constituents of Chinese Crude Drug"Wujiapi."VII. On the Structure of Glycoside E of Bei-Wujiapi
• Constituents of Chinese Crude Drug"Wujiapi". VI. Studies on the Aglycones of Steroidal Glycosides of Bei-Wujiapi (2)
• Constituents of Chinese Crude Drug"Wujiapi."V. On the Structure of Glycoside H_1 of Bei-Wujiapi
• Constituents of Chinese Crude Drug "Wujiapi". IV. On the Structure of a New Acetylbiose from Steroidal Glycosides of Bei-Wujiapi
• Constituents of Chinese Crude Drug"Wujiapi."III. On the Structure of Glycoside G and K of Bei-Wujiapi
• On the Structure of Glycoside G and K of Bei-Wujiapi
• A New Acetylbiose from Steroidal Glycosides of "Pei-Wujiapi"
• Studies on the Coloration Mechanism of Furostanol Derivatives with Ehrlich Reagent. II. On the Reaction of Furostanol Glycoside with Ehrlich Reagent
• Studies on the Coloration Mechanism of Furostanol Derivatives with Ehrlich Reagent. I. On the Reaction of 3,26-Dimethoxyfurost-5,20-diene with Ehrlich Reagent
• Studies on the Constituents of Aspidistra elatior BLUME. II. On the Steroidal Glycosides of the Leaves. (1)
• Decomposition of Usnic Acid. VII. Pyrolysis of Dihydrousnic Acid. (3). Isodihydrousnic Acid.
• Studies on the Constituents of the Root of Polygala tenuifolia WILLDENOW. II. On the Structures of Onjisaponins A, B and E
• Studies on the Constituents of the Root of Polygala tenuifolia WILLDENOW. I. Isolation of Saponins and the Structures of Onjisaponins G and F

もっと見る 閉じる

スポンサーリンク