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15 results on '"Semivioxanthin"'

1. Simple and efficient synthesis of thysanone methyl ether

Author

Bulbule, Vivek J., Koranne, Priti S., Deshpande, Vishnu H., and Borate, Hanumant B.

Subjects
*METHYL ether, *ORGANIC compounds, *ANIONS, *CARBON compounds
Abstract

Abstract: The synthesis of thysanone methyl ether is achieved by employing semivioxanthin methyl ether, which in turn is prepared by the tandem Michael addition of an anion of orsellinate to a substituted dihydropyrone. [Copyright &y& Elsevier]

Published
2007
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2. Application of directed metallation in synthesis. Part 3: Studies in the synthesis of (±)-semivioxanthin and its analogues

Author

Kamila, Sukanta, Mukherjee, Chandrani, Mondal, Sasanka S., and De, Asish

Subjects
*NAPHTHALENE, *THIOPHENES
Abstract

The synthesis of several analogues of (±)-semivioxanthin including five thiophene analogues, using directed metalation are reported. The strategy consisted of the synthesis of functionalized naphthalene or benzo[b]thiophene as building blocks followed by annelation of the pyrone. [Copyright &y& Elsevier]

Published
2003
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3. Simple and efficient synthesis of thysanone methyl ether

Author

Vishnu H. Deshpande, Vivek J. Bulbule, Hanumant B. Borate, and Priti S. Koranne

Subjects
Turn (biochemistry), chemistry.chemical_compound, chemistry, Tandem, Organic Chemistry, Drug Discovery, Michael reaction, Organic chemistry, Ether, Semivioxanthin, Biochemistry
Abstract

The synthesis of thysanone methyl ether is achieved by employing semivioxanthin methyl ether, which in turn is prepared by the tandem Michael addition of an anion of orsellinate to a substituted dihydropyrone.

Published
2007

4. Application of directed metallation in synthesis. Part 3: Studies in the synthesis of (±)-semivioxanthin and its analogues

Author

Asish De, Chandrani Mukherjee, Sasanka S. Mondal, and Sukanta Kamila

Subjects
Annulation, Chemistry, Metalation, Organic Chemistry, Semivioxanthin, General Medicine, Medicinal chemistry, Biochemistry, Pyrone, chemistry.chemical_compound, Drug Discovery, Thiophene, Organic chemistry, Naphthalene
Abstract

The synthesis of several analogues of (±)-semivioxanthin including five thiophene analogues, using directed metalation are reported. The strategy consisted of the synthesis of functionalized naphthalene or benzo[ b ]thiophene as building blocks followed by annelation of the pyrone.

Published
2003

5. Simple syntheses of (+)-orthosporin and (−)-semivioxanthin methyl ether

Author

Beena Rai, Vishnu H. Deshpande, and R. A. Khan

Subjects
chemistry.chemical_compound, chemistry, Simple (abstract algebra), Organic Chemistry, Drug Discovery, Orthosporin, Organic chemistry, Semivioxanthin, Ether, Biochemistry, Orsellinic acid
Abstract

Simple syntheses of (+)-orthosporin( 1 ) and (−)-semivioxanthin methyl ether ( 11 ) are described from (S)-ethyl 3-hydroxybutyrate ( 5 ) and orsellinic acid derivatives 3 and 4 respectively.

Published
1996

6. Synthesis of Semivioxanthin

Author

R. A. Khan, B. Rai, Nagaraj R. Ayyangar, and Vishnu H. Deshpande

Subjects
Chemistry, Organic Chemistry, Organic chemistry, Semivioxanthin
Published
1993

7. Synthetic studies on naphthopyrans from a polyketide lactone

Author

Masao Chino, Soichiro Kawazoe, Kuniaki Tatsuta, Masaya Nakata, and Nao Kojima

Subjects
chemistry.chemical_classification, Antifungal, Intramolecular reaction, Chemistry, Stereochemistry, medicine.drug_class, organic chemicals, Organic Chemistry, Semivioxanthin, Biochemistry, Polyketide, chemistry.chemical_compound, Intramolecular force, Drug Discovery, polycyclic compounds, medicine, Organic chemistry, Aldol condensation, Lactose, Lactone
Abstract

Naphthopyrans, one of which is a synthetic precursor of antifungal semivioxanthin, have been synthesized from a 14-membered polyketide lactose by the intramolecular aldolization.

Published
1993

8. Application of directed metallation in synthesis: total synthesis of model compounds related to semivioxanthin

Author

Asish De, Sukanta Kamila, and Chandrani Mukherjee

Subjects
Antifungal, Transmetalation, Chemistry, medicine.drug_class, Organic Chemistry, Drug Discovery, medicine, Total synthesis, Organic chemistry, Semivioxanthin, Biochemistry, Combinatorial chemistry
Abstract

Two model compounds related to the naturally occurring antifungal compound semivioxanthin were synthesized from readily available starting materials using a directed metallation–transmetallation–allylation–cyclization protocol.

Published
2001

9. ChemInform Abstract: Synthetic Studies on Naphthopyrans from a Polyketide Lactone

Author

Soichiro Kawazoe, Masao Chino, Kuniaki Tatsuta, Nao Kojima, and Masaya Nakata

Subjects
Antifungal, chemistry.chemical_classification, medicine.drug_class, Stereochemistry, organic chemicals, Semivioxanthin, General Medicine, chemistry.chemical_compound, Polyketide, chemistry, Intramolecular force, polycyclic compounds, medicine, Lactose, Lactone
Abstract

Naphthopyrans, one of which is a synthetic precursor of antifungal semivioxanthin, have been synthesized from a 14-membered polyketide lactose by the intramolecular aldolization.

Published
2010

11. ChemInform Abstract: Simple Syntheses of (+)-Orthosporin and (-)-Semivioxanthin Methyl Ether

Author

Beena Rai, Vishnu H. Deshpande, and R. A. Khan

Subjects
chemistry.chemical_compound, chemistry, Simple (abstract algebra), Orthosporin, Organic chemistry, Ether, Semivioxanthin, General Medicine, Orsellinic acid
Abstract

Simple syntheses of (+)-orthosporin( 1 ) and (−)-semivioxanthin methyl ether ( 11 ) are described from (S)-ethyl 3-hydroxybutyrate ( 5 ) and orsellinic acid derivatives 3 and 4 respectively.

Published
2010

13. (-)-Semivioxanthin, a new abscisic active compound against Hinoki cypress leaves isolated from Cryptosporiopsis abietina

Author

Akitami Ichihara, Hiroaki Toshima, Hiroji Sato, Megumi Deura, and Hiroshi Yada

Subjects
Antifungal, Antifungal Agents, Magnetic Resonance Spectroscopy, medicine.drug_class, Naphthols, Applied Microbiology and Biotechnology, Biochemistry, Analytical Chemistry, Trees, Ascomycota, Plant Growth Regulators, Botany, medicine, Molecular Biology, Hinoki Cypress, biology, Molecular Structure, Chemistry, Organic Chemistry, Semivioxanthin, General Medicine, Fungi imperfecti, biology.organism_classification, medicine.drug_formulation_ingredient, Active compound, Pyrones, Cladosporium herbarum, Cladosporium, Biotechnology, Abscisic Acid
Abstract

The new naphthopyrone, (-)-semivioxanthin (1) was isolated from Cryptosporiopsis abietina. The structure of 1 was determined as the reversed optical isomer of semivioxanthin by comparing its spectroscopic data with those of semivioxanthin. Compound 1 exhibited abscisic activity against Hinoki cypress leaves and antifungal activity against Cladosporium herbarum.

Published
2001

14. ChemInform Abstract: Synthesis of Semivioxanthin via a Polyketide

Author

Tadashi Okuma, Shigeo Nakamura, Masahiko Yamaguchi, and Toru Minami

Subjects
chemistry.chemical_classification, Polyketide, Ketone, chemistry, Stereochemistry, Semivioxanthin, General Medicine
Abstract

The first synthesis of semivioxanthin has been achieved via the intermediate 3,5,7,9,11-pentaoxotridecanedioate one of whose ketone groups was protected as a ketal of o-phenylenedimethanol.

Published
1990

15. Synthesis of semivioxanthin via a polyketide

Author

Tadashi Okuma, Shigeo Nakamura, Masahiko Yamaguchi, and Toru Minami

Subjects
chemistry.chemical_classification, Polyketide, chemistry.chemical_compound, Ketone, chemistry, Stereochemistry, Organic chemistry, Semivioxanthin, Phenols, Lactone
Abstract

The first synthesis of semivioxanthin has been achieved via the intermediate 3,5,7,9,11-pentaoxotridecanedioate one of whose ketone groups was protected as a ketal of o-phenylenedimethanol.

Published
1990

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