Zobrazeno 1 - 10
of 14
pro vyhledávání: '"Raoul Toubiana"'
Publikováno v:
Phytochemistry. 14:775-778
The isolation of vernoladin and vernolepin is reported. The authenticity of the occurrence of the elemane skeleton in nature is discussed, and a biosynthetic scheme concerning the genus Vernonia is proposed.
Publikováno v:
J. Chem. Soc., Perkin Trans. 1. :1940-1943
Benzotriazolyl-N-oxytris(dimethylamino)phosphonium hexafluorophosphate (‘Le BOP’ reagent) in combination with imidazole provides a very mild system for selective esterification of polyhydroxy-compounds. An example is given showing an improved sel
Publikováno v:
Tetrahedron Letters. 15:1753-1756
Publikováno v:
Carbohydrate Research. 44:308-312
Publikováno v:
Biochimie. 55:569-573
Summary Para-toluene sulfonyl chloride treatment of trehalose resulted in the isolation of 2,2′,6,6′-tetratosylate, 2,6,6′-tritosylate, 2,6-ditosylate and 6,6′-ditosylate derivatives. The first three trehalose derivatives, although previously
Autor:
Raoul Toubiana, Marie-Josèphe Toubiana
Publikováno v:
Biochimie. 55:575-578
Summary With a view to obtain cord-factor i.e. trehalose 6,6′-dimycolate in pure state and in sufficient quantity for different biological assays, its synthesis was undertaken by employing a known method proposed in 1956. However, the poor yield ob
Autor:
Alain Gaudemer, Raoul Toubiana
Publikováno v:
Tetrahedron Letters. 8:1333-1336
Publikováno v:
FEBS Letters. 8:207-209
The mass spectrometric technique for the sequence determination of amino acids in peptides has received a new impetus since procedures for 0, N-permethylation of peptide derivatives have been described [ 1, 2; for a review, see ref. 3] . However, dif
Publikováno v:
Chemistry and physics of lipids. 21(1-2)
Mycobacterium smegmatis contains a glycolipid which is shown to be a 6,6′-diester of trehalose 1 containing two moles of smegmamycolic acids 2a.
Autor:
Mayer B. Goren, Raoul Toubiana
Publikováno v:
Biochimica et biophysica acta. 574(1)
Small quantities of cord factor (trehalose-6,6'-dimycolates) can be readily and almost quantitatively permethylated in anhydrous diethyl ether/dimethylformamide mixtures with CH3I and NaH-oil dispersion in the presence of molecular sieve. Hydrolysis