CIS-1,5-DIMETHYLBICYCLO[3.3.0]OCTANE-3,7-DIONE
- CAS NO.：21170-10-5
- Empirical Formula: C10H14O2
- Molecular Weight: 166.22
- MDL number: MFCD00003772
- EINECS: 244-255-8
- SAFETY DATA SHEET (SDS)
- Update Date: 2026-01-13 13:16:58
![CIS-1,5-DIMETHYLBICYCLO[3.3.0]OCTANE-3,7-DIONE Structural](https://img.chemicalbook.in/CAS/GIF/21170-10-5.gif)
What is CIS-1,5-DIMETHYLBICYCLO[3.3.0]OCTANE-3,7-DIONE?
Chemical properties
white to light yellow crystal powde
Synthesis Reference(s)
Tetrahedron Letters, 9, p. 4885, 1968 DOI: 10.1016/S0040-4039(00)72784-5
General Description
Olefination of cis-1,5-dimethylbicyclo[3.3.0]octane-3,7-dione with (carbethoxyethylidene)triphenylphospharane under controlled microwave heating has been investigated. It reacts with carbon disulfide, strong base and an alkylating agent in dipolar aprotic solvents to yield racemic mixtures of 2-dialkylthio-methylene compounds.
Properties of CIS-1,5-DIMETHYLBICYCLO[3.3.0]OCTANE-3,7-DIONE
| Melting point: | 228-230 °C(lit.) |
| Boiling point: | 254.44°C (rough estimate) |
| Density | 1.0060 (rough estimate) |
| refractive index | 1.4930 (estimate) |
| color | Faint yellow/faint beige |
| CAS DataBase Reference | 21170-10-5(CAS DataBase Reference) |
Safety information for CIS-1,5-DIMETHYLBICYCLO[3.3.0]OCTANE-3,7-DIONE
| Signal word | Warning |
| Pictogram(s) |
 Exclamation Mark Irritant GHS07 |
| GHS Hazard Statements |
H315:Skin corrosion/irritation H319:Serious eye damage/eye irritation H335:Specific target organ toxicity, single exposure;Respiratory tract irritation |
| Precautionary Statement Codes |
P261:Avoid breathing dust/fume/gas/mist/vapours/spray. P305+P351+P338:IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing. |
Computed Descriptors for CIS-1,5-DIMETHYLBICYCLO[3.3.0]OCTANE-3,7-DIONE
New Products
Levothyroxine Impurity-F Montelukast EP Impurity-D/Montelukast USP Related Compound C Atorvastatin FXA Impurity/Atorvastatin Cyclic 6-Hydroxy Impurity Sodium Salt Isosulfan blue Keto N-Oxide Impurity Ivermectin Impurity F N-Nitroso des Methyl Tramadol/N-Nitroso-N-Desmethyl-Tramadol DL-beta-(3-Bromophenyl)alanine Tetrabutylammonium perchlorate N,O-Dimethylhydroxylamine hydrochloride (RS)-beta-Amino-beta-(4-bromophenyl)propionic acid 2-Amino-5-bromo-4-(trifluoromethyl)pyridine（RM for Indian lab) N,N CARBONYL DIIMIDAZOLE (R)-BoroLeu-(+)-Pinanediol-CF3COOH 1,4-bis(methylsulfonyl)butane 4-(5-amino-1-methyl-1h-benzoimidazol-2-yl)-butyric acid isopropyl ester. 5-Methyl-1,3-benzenediacetonitrile 4-Fluorothiophenol 1-methyl amino-2,4-dinitro benzene CSA (DL-10-Camphorsulfonic Acid) 2-Hydroxy-4-methylnicotinic acid 3-iodo-1H-pyrazolo[3,4-d]pyrimidin-4-amine (2S)-1-((2S,3S)-3-(2-methylbutyl)-4-oxooxetan-2-yl)pentadecan-2-yl formylleucinate 1-(3,5-dichlorophenyl)-2,2,2-trifluoroethane-1-sulfonyl chloride S-(1-(3,5-dichlorophenyl)-2,2,2-trifluoroethyl) ethanethioateRelated products of tetrahydrofuran
![2-Methyl-octahydro-pyrrolo[3,4-c]pyrrole](https://img.chemicalbook.in/CAS/GIF/CB31456766.gif)
![CIS-BICYCLO[3.3.0]OCTANE-3,7-DIONE](https://img.chemicalbook.in/CAS/GIF/51716-63-3.gif)
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