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3a,6a-Dimethyl-2,3,3a,5,6,6a-hexahydrofuro[3,2-b]furan-2,5-dione, C8H10O4

✍ Scribed by Caira, M. R. ;Watson, W. H. ;Kagan, J. ;Singh, S. P.

Book ID
114502021
Publisher
International Union of Crystallography
Year
1984
Tongue
English
Weight
320 KB
Volume
40
Category
Article
ISSN
0108-2701

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📜 SIMILAR VOLUMES

6,6,8a-Tri­methyl-3a,6,7,8a-tetra­hydro­
6,6,8a-Tri­methyl-3a,6,7,8a-tetra­hydro­benzo­[b]­furo­[3,2-d]­furan-2,4(3H,5H)-dione
✍ Nagaraj, Basavegowda ;Yathirajan, Hemmige S. ;Nagaraja, Padmarajaiah ;Lynch, Dan 📂 Article 📅 2005 🏛 International Union of Crystallography 🌐 English ⚖ 106 KB

The structure of the title compound, C 13 H 16 O 4 , comprises a non-planar chiral molecule where the cyclohexene double bond is distinctly shorter [1.335 (2) A ˚] than the neighbouring C-C single bonds (>1.4 A ˚).

ChemInform Abstract: (2R,3R,5R)-2-[(2R,3
ChemInform Abstract: (2R,3R,5R)-2-[(2R,3aS,6aR)-2,3,3a,4,5,6a-Hexahydrofuro [2,3-b]furan-2-yl]-5-isopropenyl-2,3-dimethylcyclohexanone and (4aR,5S,7R) -5-isopropenyl-7,8,8-trimethyl-2,3,4,4a,5,6,7,8-octahydronaphthalene-2-o xo-4a-carbonitrile.
✍ Dianne D. Ellis; Anthony L. Spek 📂 Article 📅 2001 🏛 John Wiley and Sons ⚖ 28 KB 👁 1 views

## Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable v

4-Hydroxy-3,4a,8-trimethyl-3,3a,4,4a,7a,
4-Hydroxy-3,4a,8-trimethyl-3,3a,4,4a,7a,8,9,9a-octahydroazuleno[6,5-b]furan-2,5-dione
✍ Pu, Shou-Cheng ;Tu, Chun-Ling ;Deng, Yi 📂 Article 📅 2007 🏛 International Union of Crystallography 🌐 English ⚖ 400 KB

The title compound, C 15 H 20 O 4 , also known as dihydrohelenalin, is a drug obtained from a Chinese plant. It contains a seven-membered ring in a chair conformation and two fivemembered rings in twist conformations. The crystal packing involves O-HÁ Á ÁO hydrogen bonds. ## Related literature Fo

1-Isopropyl-6,6,8a-trimethyl-1,3a,5,6,7,
1-Isopropyl-6,6,8a-trimethyl-1,3a,5,6,7,8a-hexa­hydro-3H-1-benzofuro[2,3-b]pyrrole-2,4-dione
✍ Narasegowda, R. N. ;Yathirajan, H. S. ;Lynch, D. E. ;Narasimhamurthy, T. ;Rathor 📂 Article 📅 2006 🏛 International Union of Crystallography 🌐 English ⚖ 156 KB

The crystal structure of the title benzofuran derivative, C~16~H~23~NO~3~, has been elucidated. The tricyclic core, __i.e.__ the tetrahydrobenzo–dihydrofuro–pyrrolidine ring system, is non-planar owing to the folding of the five-membered rings at their __cis__ junction. The cyclohexene ring assumes