Naslov
The crystal and molecular structure of methyl-3, 4- di-O-pivaloyl-beta-D-xylopyranoside

Autori
Matković-Čalogović, Dubravka ; Prugovečki, Biserka ; Petrović Peroković, Vesna ; Tomić, Srđanka

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
Twelfth Croatian-Slovenian crystallographic meeting : Book of abstracts / Cetina, Mario ; Kajfež, Tanja ; Popović, Stanko ; Štefanić, Zoran - Zagreb : Hrvatska akademija znanosti i umjetnosti (HAZU) ; Hrvatska kristalografska zajednica HAZU, 2003, 43-43

Skup
Twelfth Croatian-Slovenian crystallographic meeting

Mjesto i datum
NP Plitvička jezera, Hrvatska, 19.06.2003. - 22.06.2003

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
crystal structure ; methyl-3 ; 4-di-O-pivaloyl-beta-D-xylopyranoside

Sažetak
Saccharides contain a multitude of hydroxyl groups which have to be manipulated selectively in directed synthesis of carbohydrate derivatives. In our investigations of monosaccharides O-acyl groups were used as protective groups and it was shown that pivaloyls, in contrast to acetyls, can be introduced into a molecule with a satisfactory degree of selectivity using standard chemical methods. It was also shown that they can be removed selectively by using enzymes. In the case of partially pivaloylated products such as methyl- 3, 4-di-O-pivaloyl-beta-D-xylopyranoside [V. Petrović, S. Tomić, D. Ljevaković, J. Tomašić, Carbohydr. Res. 302 (1997)13-18], the main problem was identification of the position of pivaloyl groups in the sugar moiety. Positions of the pivaloyl groups were undoubtedly determined by single-crystal X-ray diffraction. Crystal data were collected on three different diffractometers: Philips PW1100/Stoe&Cie diffractometer using MoKa radiation at room temperature, Enraf Nonius KappaCCD diffractometer with rotating-anode using CuKa radiation at 100 K and Oxford diffraction Xcalibur Sapphire 2 CCD diffractometer using both MoKa and CuKa radiation at 100 K. The geometry of the molecule will be discussed and the comparison of different data sets will be presented.

Izvorni jezik
Engleski

Znanstvena područja
Kemija

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