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2-Azido-2-de­oxy-2,4-C-dimethyl-3,4-O-isopropyl­idene-l-ribono-1,5-lactone

✍ Scribed by Booth, Kathrine V. ;Watkin, David J. ;Jenkinson, Sarah F. ;Fleet, George W. J.

Publisher
International Union of Crystallography
Year
2007
Tongue
English
Weight
308 KB
Volume
63
Category
Article
ISSN
1600-5368

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✦ Synopsis

The relative configuration of the title lactone, C 10 H 15 N 3 O 4 , a compound of value in the synthesis of complex pyrrolidines, was determined by X-ray crystallographic analysis.

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2-C-Azido­methyl-2-de­oxy-3,4-O-isopropy
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X-ray crystallographic analysis firmly establishes the ribo stereochemistry and the unusual boat conformation of the title branched carbon chain lactone, C 9 H 13 N 3 O 4 , arising from an unexpected rearrangement in the nucleophilic substitution of a trifluoromethanesulfonate. There are two molecul

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Single-crystal X-ray study T = 120 K Mean '(C±C) = 0.004 A Ê R factor = 0.045 wR factor = 0.102 Data-to-parameter ratio = 11.0 For details of how these key indicators were automatically derived from the article, see http://journals.iucr.org/e.

2,4-Dimethyl-3,4-O-isopropyl­idene-l-ara
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✍ Booth, Kathrine V. ;Watkin, David J. ;Jenkinson, Sarah F. ;Fleet, George W. J. 📂 Article 📅 2007 🏛 International Union of Crystallography 🌐 English ⚖ 275 KB

The relative configuration at C-2 of 2,4-dimethyl-3,4-__O__-isopropylidene-L-arabinono lactone, C~10~H~16~O~5~, which exists in the boat form, was unequivocally established by X-ray crystallographic analysis. The absolute configuration was determined by the use of 2-__C__-methyl-D-ribonolactone as a

3,4-O-Isopropyl­idene-2-C-methyl-d-arabi
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✍ Punzo, Francesco ;Watkin, David J. ;Jenkinson, Sarah F. ;Fleet, George W. J. 📂 Article 📅 2004 🏛 International Union of Crystallography 🌐 English ⚖ 250 KB

Single-crystal X-ray study T = 190 K Mean '(C±C) = 0.002 A Ê R factor = 0.031 wR factor = 0.078 Data-to-parameter ratio = 12.0 For details of how these key indicators were automatically derived from the article, see http://journals.iucr.org/e.

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The title compound, C~26~H~31~F~3~O~8~SSi, provides a unique example of the crystal structure of an organic trifluoromethanesulfonate attached to a primary C atom. The absolute configuration is determined by the use of D-ribose as the starting material.