Zobrazeno 1 - 10
of 238
pro vyhledávání: '"Melvyn V. Sargent"'
Autor:
Dayar Arbain, Melvyn V. Sargent
Publikováno v:
ASEAN Journal on Science and Technology for Development, Vol 4, Iss 1, Pp 41-44 (2017)
A Preliminary Investigation of The Alkaloid of Phoebe Lanceolata
Externí odkaz:
https://doaj.org/article/a2f6258002624bffa41fb7755068090a
Autor:
Robert W. Baker, Simon O. Rea, Elisabeth M.C. Schenkelaars, Melvyn V. Sargent, Tjitjik Srie Tjahjandarie, Angela Totaro
Publikováno v:
Tetrahedron. 61:3733-3743
Racemic 1-(1′-isoquinolinyl)-2-naphthalenemethanol rac-12 was prepared through a ligand coupling reaction of racemic 1-(tert-butylsulfinyl)isoquinoline rac-7 with the 1-naphthyl Grignard reagent 10. Resolution of rac-12 was achieved through chromat
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::313695c124d5fb69d41c9ab8935b80a6
https://doi.org/10.1016/j.tet.2005.02.008
https://doi.org/10.1016/j.tet.2005.02.008
Publikováno v:
Tetrahedron Letters. 40:3475-3478
Schmidt reaction of ( S )-1-(2′, 4′, 6-trimethoxy-4, 6′-dimethylbiphenyl-2-yl)ethanone 8 furnished the expected amide 9 (43%) accompanied by ( S )-2, 7′-dimethoxy-3′, 5′, 6-trimethylspiro[cyclohexa-2, 5-diene-1, 1′-(1 H )isoindole]-4-on
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::392a80e256f75b1757cb9cabc7ed0846
https://doi.org/10.1016/s0040-4039(99)00427-x
https://doi.org/10.1016/s0040-4039(99)00427-x
Publikováno v:
Journal of the Chemical Society, Perkin Transactions 1. :3029-3038
Addition of 7-benzyloxy-4,5-dimethoxy-1-naphthol 3 as its triisopropoxytitanium naphtholate to (2R, 1′R or S)-2-(1′-ethoxyethoxy)propanal 4 afforded solely (1S, 2R, 1″R or S)-1-(7′-benzyloxy-4′,5′-dimethoxy-1′-hydroxy-2′-naphthyl)-2-(
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::550465b6e1d09aa967eacdda52929ed0
https://doi.org/10.1039/a901456j
https://doi.org/10.1039/a901456j
Publikováno v:
Journal of the Chemical Society, Perkin Transactions 2. :1333-1338
The synthesis of a number of 2-substituted 1-(tert-butylsulfinyl)naphthalenes is described and the free energies of activation (ΔG ‡ = 50.0–80.7 kJ mol–1) for their stereomutation about the S–Ar bonds have been determined. It is shown that t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e79b242b800c91b932a955689b533015
https://doi.org/10.1039/a801322e
https://doi.org/10.1039/a801322e
Publikováno v:
Journal of the Chemical Society, Perkin Transactions 1. :2537-2540
The alkaloid content of two different collections of Ophiorrhiza blumeana Korth. (Rubiaceae) was investigated. The first collection yielded the known alkaloid bracteatine 5 and two new alkaloids ophiorrhizine-12-carboxylate 6 and blumeanine 7. The se
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1a5084fd24520ed94310f1f4d69bac06
https://doi.org/10.1039/a803547d
https://doi.org/10.1039/a803547d
Publikováno v:
Tetrahedron Letters. 37:7851-7854
Chiral compounds 16 and 17, precursors to the aphid insect pigment derivatives, have been prepared in good to high yield, with complete control of the diastereoselectivity at the newly-created chiral centre C-1, through the use of metal phenolates de
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d367c58629bd11d65026e7423718c5ab
https://doi.org/10.1016/0040-4039(96)01748-0
https://doi.org/10.1016/0040-4039(96)01748-0
Autor:
Melvyn V. Sargent, Allan H. White, Geoffrey R. Pocock, David C. R. Hockless, Alexander N. Sobolev, Brian W. Skelton, E. Twiss, Robert W. Baker
Publikováno v:
J. Chem. Soc., Perkin Trans. 1. :2615-2629
1-(Alkyl- or aryl-sulfinyl)naphthalenes activated by electron-withdrawing substituents at the 2-position undergo substitution reactions on treatment with Grignard reagents. Evidence suggesting that these transformations proceed through ligand-couplin
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::07ee3d03beed72089bcc955b57cee610
https://doi.org/10.1039/p19950002615
https://doi.org/10.1039/p19950002615
Publikováno v:
Acta Crystallographica Section E Structure Reports Online. 60:o86-o88
The structure of the title compound, C20H20O8, which was extracted from Rhodomyrtus tomentosa, confirms the connectivity and is consistent with the results from spectroscopy. The structure, notable for the crowded sequence of (3′,4′,5′) trime
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8f67ff8731a698d6e3e6615769253e7d
https://doi.org/10.1107/s1600536803027880
https://doi.org/10.1107/s1600536803027880
Autor:
Brian W. Skelton, Simon O. Rea, Allan H. White, Robert W. Baker, Melvyn V. Sargent, Elisabeth M.C. Schenkelaars
Publikováno v:
Tetrahedron: Asymmetry. 5:45-48
Racemic 1-(1-isoquinolinyl)-2-naphthalenemethanol 6 has been prepared through a ligand coupling reaction of racemic 1-( tert -butylsulfinyl)isoquinoline 2 with the 1-naphthyl Grignard reagent 4 . Resolution of the ligand 6 was achieved through chroma
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::94cbc753da40bdb101d8aa85427dc819
https://doi.org/10.1016/s0957-4166(00)80482-6
https://doi.org/10.1016/s0957-4166(00)80482-6