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(1aR,2aS,5aS,5bS)-Perhydro-4H-oxireno[3,4]cyclo­penta­[1,2-b]furan-4-one

✍ Scribed by Peifer, Christian ;Tschertsche, Melanie ;Schollmeyer, Dieter ;Laufer, Stefan

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

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✦ Synopsis

The structure of the title compound, C~7~H~8~O~3~, was determined in the course of our studies of the synthesis of cyclopenta[1,2-b]furan-4-one derivatives. The molecule has four chiral C atoms. The X-ray crystal structure analysis shows the compound to possess an epoxide group with an endo orientation with respect to the lactone group.

📜 SIMILAR VOLUMES

1,4-Di­methyl-1,5,6,7-tetra­hydro-2H-cyc
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✍ Albov, Dmitry V. ;Rybakov, Victor B. ;Babaev, Eugene V. ;Aslanov, Leonid A. 📂 Article 📅 2004 🏛 International Union of Crystallography 🌐 English ⚖ 176 KB

Single-crystal X-ray study T = 293 K Mean '(C±C) = 0.002 A Ê R factor = 0.045 wR factor = 0.103 Data-to-parameter ratio = 15.7 For details of how these key indicators were automatically derived from the article, see http://journals.iucr.org/e.

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✍ Ullrich, Thomas ;Pyerin, Michael ;Mereiter, Kurt 📂 Article 📅 2006 🏛 International Union of Crystallography 🌐 English ⚖ 238 KB

The title compound, C~11~H~16~N~2~ ^2+^·2Cl^−^·H~2~O, is a novel conformationally constrained tricyclic analogue of nicotine, in which the pyridine and pyrrolidine rings of the latter are bridged by a CH~2~ group. As result of this bridge, these two rings are no longer approximately perpendicular as

(1S,2R,2′S,3′aS,5R)-2′-[(1S)-1-Hydroxy­e
(1S,2R,2′S,3′aS,5R)-2′-[(1S)-1-Hydroxy­ethyl]-2-isopropyl-5,5′-dimethyl-3′,3′a-dihydro-2′H-spiro­[cyclo­hexane-1,6′-imidazo[1,5-b]isoxazol]-4′(5′H)-one
✍ Aouadi, Kaiss ;Jeanneau, Erwann ;Praly, Jean-Pierre 📂 Article 📅 2007 🏛 International Union of Crystallography 🌐 English ⚖ 349 KB

Cycloaddition of a (−)-menthone-derived nitrone to racemic but-3-en-2-ol led to two spirobicyclic heterocycles, with opposite configurations at the C atom attached to the OH group. This paper describes the __R__ epimer of the 1-hydroxyethyl substituent in imidazoisoxazole C~17~H~30~N~2~O~3~, (I). Th

(1S,2R,2′S,3′aS,5R)-2′-[(1R)-1-Hydroxy­e
(1S,2R,2′S,3′aS,5R)-2′-[(1R)-1-Hydroxy­ethyl]-2-isopropyl-5,5′-dimethyl-3′,3′a-dihydro-2′H-spiro­[cyclo­hexane-1,6′-imidazo[1,5-b]isoxazol]-4′(5′H)-one
✍ Aouadi, Kaiss ;Jeanneau, Erwann ;Praly, Jean-Pierre 📂 Article 📅 2007 🏛 International Union of Crystallography 🌐 English ⚖ 328 KB

Cycloaddition of a (−)-menthone-derived nitrone to racemic but-3-en-2-ol led to two spirobicyclic heterocycles, with opposite configurations at the C atom attached to the OH group. This paper describes the __S__ epimer of the 1-hydroxyethyl substituent in imidazoisoxazole C~17~H~30~N~2~O~3~, (I). Th

1-[(4aS,5R,7R,7aS)-7-Hydroxy­methyl-3,4,
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✍ Sun, Jing-Bo ;Yang, Hua ;Wu, Jin-Chang 📂 Article 📅 2007 🏛 International Union of Crystallography 🌐 English ⚖ 145 KB

The title compound, C 11 H 15 N 3 O 6 S, is a 2 0 ,3 0 -thiazine-fused bicyclic nucleoside. The furanose ring adopts a 3 0 -endo,4 0 -exo conformation 4 T 3 . The orientation of the pyrimidine ring is anti with respect to the sugar group. The crystal packing is stabilized by intermolecular N-HÁ Á ÁO