3,4-O-Isopropylidene-2-C-methyl-d-galactonolactone
نویسندگان
چکیده
X-ray crystallography unequivocally confirmed the stereochemistry of the 2-C-methyl group in the title mol-ecule, C(10)H(16)O(6), in which the 1,5-lactone ring exists in a boat conformation. The use of d-galactose in the synthesis determined the absolute stereochemistry. The crystal exists as O-H⋯O hydrogen-bonded layers in the ab plane, with each mol-ecule acting as a donor and acceptor for two hydrogen bonds.
منابع مشابه
2-N-Benzyl-2,6-dideoxy-2,6-imino-3,4-O-isopropylidene-3-C-methyl-d-allononitrile
X-ray crystallography firmly established the relative stereochemistry of the title compound, C(17)H(22)N(2)O(3). The absolute configuration was determined by use of 2-C-methyl-d-ribonolactone as the starting material. The compound exists as O-H⋯N hydrogen-bonded chains of mol-ecules running parallel to the a-axis.
متن کامل2-Azido-2-deoxy-3,4-O-isopropylidene-2-C-methyl-d-talono-1,5-lactone
The relative stereochemistry of the title compound, C(10)H(15)N(3)O(5), was confirmed by the crystal structure determin-ation. The absolute configuration was determined from the use of d-lyxonolactone as the starting material. The six-membered ring adopts a boat conformation with the larger azide group, rather than the methyl group, in the bowsprit position. In the crystal structure, a bifurcat...
متن کاملMethyl 3,4-O-isopropylidene-2-O-[(methylsulfanyl)thiocarbonyl]-β-l-arabinoside
In the title compound, C(11)H(18)O(5)S(2), the six- and five-membered rings adopt a chair and an approximately planar conformation, respectively.
متن کامل6-Deoxy-3,4-O-isopropylidene-2-C-methyl-l-galactono-1,5-lactone
X-ray crystallography unequivocally confirmed the stereochemistry of the 2-C-methyl group in the title mol-ecule, C(10)H(16)O(5), in which the 1,5-lactone ring exists in a boat conformation. The absolute stereochemistry was determined by the use of d-ribose in the synthesis. The crystal exists as O-H⋯O hydrogen bonded chains of mol-ecules running parallel to the a axis with each mol-ecule actin...
متن کاملRedetermination of methyl 3,4-O-isopropylidene-β-D-fucopyranoside monohydrate
In the title compound, C(10)H(18)O(5)·H(2)O, the fucopyran-oside ring adopts a chair conformation. The crystal packing is stabilized by inter-molecular O-H⋯O and C-H⋯O hydrogen bonds together with intra-molecular O⋯O [2.2936 (8) Å] and inter-molecular O⋯O [2.7140 (8)-2.829 (3) Å] short contacts. The mol-ecules are linked together to form an infinite chain along the a axis. This structure has be...
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عنوان ژورنال:
دوره 66 شماره
صفحات -
تاریخ انتشار 2010