Results 191 to 200 of about 58,416 (219)

C32-amino derivatives of the immunosuppressant ascomycin

Bioorganic & Medicinal Chemistry Letters, 1997
Abstract Various C32-amino derivatives were investigated as replacements for the C32-hydroxyl group of ascomycin and its C24-deoxy analog. The syntheses of these amino derivatives and their biological evaluation are reported herein.
Hyun O. Ok, John L. Szumiloski, Thomas R. Beattie, Mark T. Goulet, Mary Jo Staruch, Francis J. Dumont, Matthew J. Wyvratt   +6 more
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Adjuvant properties of a simplified C32 monomycolyl glycerol analogue

Bioorganic & Medicinal Chemistry Letters, 2009
A simplified C(32) monomycolyl glycerol (MMG) analogue demonstrated enhanced immunostimulatory activity in a dioctadecyl ammonium bromide (DDA)/Ag85B-ESAT-6 formulation. Elevated levels of IFN-gamma and IL-6 were produced in spleen cells from mice immunised with a C(32) MMG analogue comparable activity to the potent Th1 adjuvant, trehalose 6,6'-di ...
Veemal, Bhowruth, David E, Minnikin, Else Marie, Agger, Peter, Andersen, Vincent W, Bramwell, Yvonne, Perrie, Gurdyal S, Besra   +6 more
openaire   +2 more sources

Synthesis of the C23–C32 fragment of spirangien

Tetrahedron Letters, 2007
Abstract The synthesis of the C23–C32 fragment of spirangien A is reported using Evans’ alkylation, Evans–Metternich aldol reaction and a substrate controlled stereoselective reduction.
Michael Lorenz, Markus Kalesse
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Structures of three C32 triterpenoids from Neolitsea pulchella

Journal of the Chemical Society C: Organic, 1971
Three triterpenoids isolated from Neolitsea pulchella, have been proved by n.m.r. and mass spectral data, and chemical correlations with one another and with cycloneolitsin (3β-methoxy-24,24-dimethyl-9,19-cyclolanost-25-ene) to be 3β-methoxy-24,24-dimethyl-lanosta-9(11),25-diene (I), 24,24-dimethyl-lanosta-9(11),25-dien-3-one (II), and 24ξ-hydroxy-3β ...
W. H. Hui, K. Luk, H. R. Arthur, S. N. Loo   +3 more
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Mallotin—a new C32 triterpenoid from Mallotous stenanthus

Phytochemistry, 1975
Abstract Mallotin, a new C 32 triterpene from Mallotous stenanthus , has been isolated and its structure established as 24,24-dimethyl-lanosta-7,25-dien-3α-ol.
Raghwendra Pal, D.K. Kulshreshtha, R.P. Rastogi   +2 more
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Calyculins. Asymmetric synthesis of the C26-C32 fragment

Tetrahedron Letters, 1994
An efficient and highly stereocontrolled method for the construction of the natural syn stereochemistry at C30 and C32 in the calyculin C oxazole fragment has been devised starting from alanine. The title fragment itself is accessible in seven steps from N-BOC-alaninal.
Ari M.P. Koskinen, Petri M. Pihko
openaire   +1 more source

Electronic structures and spectral characteristics of the six C32 fullerene isomers

Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 2019
In this paper, the six C32 isomers which were of crucial importance in the manufacture of new electronic components were identified by X-ray photoelectron spectroscopy (XPS) and near-edge X-ray absorption fine structure (NEXAFS). For the discernment, geometry optimizations of the six isomers have been carried out, and the C1s XPS and NEXAFS spectra ...
Juan Lin, Jing Hu, Jun-Rong Zhang, Sheng-Yu Wang, Yong Ma, Xiu-Neng Song   +5 more
openaire   +2 more sources

Biosynthèse de l'acide C32-mycocérosique incorporation d'acide propionique

Biochimica et Biophysica Acta, 1963
Abstract [I-14C]Propionic acid is incorporated into the branched end of C32-mycocerosic acid and of its lower C26-homolog.
Mireille Gastambide-Odier, Jeanne-Marie Delaumény, Edgar Lederer   +2 more
openaire   +1 more source

MPEC 2025-C32 : 2025 CU

The Minor Planet Electronic Circulars contain information on unusual minor planets, routine data on comets and natural satellites, and occasional editorial announcements. They are published on behalf of Division F of the International Astronomical Union by the Minor Planet Center, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
openaire   +1 more source

C32. A New Proposed Anti-collision Algorithm for RFID

2013 30th National Radio Science Conference (NRSC), 2013
Abstract-Radio Frequency Identification (RFID) systems are used in a variety of applications to uniquely identify physical objects. However, the most popular problem that always faces RFID systems is the collision between several tags that are present in the interrogation zone of a single reader at the same time. So, the reader will receive data, which
Amira S. E- Batouty, Hania H. Farag, El-Sayed E. Badawy   +2 more
openaire   +1 more source