Zobrazeno 1 - 10 of 89 pro vyhledávání: '"Nagaraj R. Ayyangar"'
1
Photochemical rearrangement of α-chloro-propiophenones to α-arylpropanoic acids: studies on chirality transfer and synthesis of (S)-(+)-ibuprofen and (S)-(+)-ketoprofen
Autor: Dilip G. Kulkarni, Nanjundiah S. Bellur, Harikisan R. Sonawane, Nagaraj R. Ayyangar
Publikováno v: Tetrahedron. 50:1243-1260
A new single-step efficient photocchemical approach for α-arylpropanoic acids ( 4 ) from α chloro-propiophenones ( 5 ) is described. It involves carbonyl triplet excited state directed 1,2-aryl migration of the aryl group which has been found to be
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::4dafb24a6116f796f2f1d1bc59f5de4a
https://doi.org/10.1016/s0040-4020(01)80835-8
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2
Regiospecific Synthesis of Bikaverin
Autor: R. A. Khan, Vishnu H. Deshpande, Nagaraj R. Ayyangar
Publikováno v: Synthetic Communications. 23:2677-2682
A regiospecific synthesis of bikaverin (1) is described starting from methyl 2-hydroxy-4-methoxy-6-methyl benzoate (2) and 2-chloro-5,7-dimethoxy-1,4-naphoquinone (4).
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::48081b90f1cbbb0a657ea8d2f3f1de29
https://doi.org/10.1080/00397919308013797
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4
ChemInform Abstract: Novel Photochemical Synthesis of a Model Spiro Compound Related to Fredericamycin-A
Autor: Uday R. Khire, Nagaraj R. Ayyangar, Bipin Pandey
Publikováno v: ChemInform. 22
Photolysis of the enones 4a–c leads to regioselective hydrogen abstraction and subsequent cyclization to furnish the spiro compounds 5a–d, which on further elaboration provide the spiro dione 6, a model for the antitumour antibiotic, fredericamyc
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::ae93b27ece141209043e10c2751d5701
https://doi.org/10.1002/chin.199120159
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5
ChemInform Abstract: A Novel Reaction of Acetanilide with Nitrobenzene in DMSO. An Unusual Solvent Assisted Regioselective Aromatic Nucleophilic Substitution
Autor: Nagaraj R. Ayyangar, S. N. Naik, K. V. Srinivasan
Publikováno v: ChemInform. 22
The reaction of acetanilide (1) with nitrobenzene (2) in the presence of a base in DMSO yielded p -nitrosodiphenylamine (3) as the major product. This unusual regioselective formation of the deoxygenated product 3 has been rationalized in terms of so
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::19a3928dbd03b07d11216dc3490f83ce
https://doi.org/10.1002/chin.199126147
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8
ChemInform Abstract: Synthesis of (.+-.)-Heritol
Autor: P. K. Zubaidha, Uday S. Racherla, Subhash P. Chavan, Nagaraj R. Ayyangar
Publikováno v: ChemInform. 22
Synthesis of (±)heritol and epi -heritol is described. The key step is the osmylation of the unsaturated ester 9a. Osmylation is used as a tool to construct the α,β-unsaturated γ-lactone system.
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::acb880ed9d305bfe81f18f752b4c7eb4
https://doi.org/10.1002/chin.199143208
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