منابع مشابه
Photochemistry of Diazocompounds and Azides in Argon
The introduction of matrix techniques to the synthesis and study of reactive organic molecules has substantially extended the range of molecules available for investigation (Ref. 1). It is now increasingly the case that we need new chemical methods to make progress in this area of investigation. Diazocompounds and azides have proved especially useful as starting points for a new style of photoc...
متن کاملRegiospecific anomerisation of acylated glycosyl azides and benzoylated disaccharides by using TiCl4.
Chelation induced anomerisation is promoted when Lewis acids, such as TiCl4 or SnCl4, coordinate to the pyranose ring oxygen atom and another site, giving rise to endocyclic cleavage and isomerisation to the more stable anomer. In this research regiospecific site-directed anomerisation is demonstrated. TiCl4 (2.5 equiv) was employed to induce anomerisation of 15 glycosyl azide and disaccharide ...
متن کاملExploring photochemistry of p-bromophenylsulfonyl, p-tolylsulfonyl and methylsulfonyl azides by ultrafast UV-pump-IR-probe spectroscopy and computations.
The photochemistry of p-bromophenylsulfonyl azide (BsN3), p-tolylsulfonyl azide (TsN3) and methylsulfonyl azide (MsN3) was studied by femtosecond time-resolved infrared spectroscopy with CH2Cl2 and CCl4 as solvents along with quantum chemical calculations. The photolysis of these azides after 267 nm light excitation leads to the population of each respective azide S1 excited state. Decay of the...
متن کاملSynthesis of glycosyl phosphoramidates: novel isosteric analogues of glycosyl phosphates.
Several newer isosteric analogues of glycosyl phosphates, namely of glycosyl phosphoramidates, were synthesized in good yields using Staudinger reaction of their corresponding azides with trimethyl phosphite followed by de-O-acetylation. The structure and conformation of the fully protected analogue synthesized, namely 2,3,4,6-tetra-O-acetyl-beta-D-glucopyranosyl bismethoxyphosphoramidate, was ...
متن کاملAzides in Carbohydrate Chemistry
The fi rst az.ide-contain ing sugar, a glycosyl azide. was reponed in 1930 by Bertho. j Since that lime various methods have been developed for the introduction of azides at d ifferent positions of sugars. A survey of available methods is given in Section 16.2. Unlillhc lale I 970s, azidcs contai ned in carbohydrate deri vatives were simply used as accessible syn-thons [or amities because of th...
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ژورنال
عنوان ژورنال: Canadian Journal of Chemistry
سال: 1974
ISSN: 0008-4042,1480-3291
DOI: 10.1139/v74-028