cis-1,5-dimethylbicyclo[3.3.0]octane-3,7-dione

Modify Date: 2025-08-25 20:38:00

cis-1,5-dimethylbicyclo[3.3.0]octane-3,7-dione structure	Common Name	cis-1,5-dimethylbicyclo[3.3.0]octane-3,7-dione
	CAS Number	21170-10-5	Molecular Weight	166.21700
	Density	1.142g/cm3	Boiling Point	257.5ºC at 760 mmHg
	Molecular Formula	C₁₀H₁₄O₂	Melting Point	228-230ºC(lit.)
	MSDS	USA	Flash Point	95ºC

Use of cis-1,5-dimethylbicyclo[3.3.0]octane-3,7-dione

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.

Name	3a,6a-dimethyl-1,3,4,6-tetrahydropentalene-2,5-dione
Synonym	More Synonyms

Density	1.142g/cm3
Boiling Point	257.5ºC at 760 mmHg
Melting Point	228-230ºC(lit.)
Molecular Formula	C₁₀H₁₄O₂
Molecular Weight	166.21700
Flash Point	95ºC
Exact Mass	166.09900
PSA	34.14000
LogP	1.72480
Vapour Pressure	0.0145mmHg at 25°C
Index of Refraction	1.522

MSDS(Chinese)

Personal Protective Equipment	Eyeshields;Gloves;type N95 (US);type P1 (EN143) respirator filter
Hazard Codes	Xi
Safety Phrases	24/25
RIDADR	NONH for all modes of transport
WGK Germany	3

N/A

CAS#:21170-09-2

~83%

cis-1,5-dimethy...

CAS#:21170-10-5

Literature: Coates, Robert M.; Shach, Shrenik K.; Mason, Robert W. Journal of the American Chemical Society, 1982 , vol. 104, # 8 p. 2198 - 2208

Precursor 0
DownStream 4
CAS#:85433-63-2 3a,6a-dimethyl-... CAS#:111718-07-1 (3ar,6ar)-2,5-d... CAS#:84451-91-2 (3aS,6aS)-3a,6a... CAS#:791-28-6 Triphenylphosph...

Microwave-assisted regioselective olefinations of cyclic mono-and di-ketones with a stabilized phosphorus ylide. Wu J, et al.

Tetrahedron 62(19) , 4643-50, (2006)

DITHIOCARBOXYLIERUNGSREAKTIONEN VON cis-BICYCLO [3.3. 0] OCTAN-3, 7-DIONEN. MOLEKÜL-UND KRISTALLSTRUKTUR VON cis-2, 6-BIS (DIMETHYLTHIO-METHYLEN)-BICYCLO [3.3. 0] OCTAN-3, 7-DION. Dölling W, et al.

Phosphorus. Sulfur. Silicon Relat. Elem. 113(1-4) , 263-74, (1996)

1,5-dimethyl-bicyclo<3.3.0>octandion

1,5-Dimethylbicyclo<3.3.0>octan-3,7-dione

cis-3a,6a-Dimethyltetrahydropentalene-2,5(1H,3H)-dione

EINECS 244-255-8

1,5-Dimethylbicyclo<3.3.0>octan-3,7-dion

rel-(3aR,6aR)-3a,6a-diMethyl-octahydropentalene-2,5-dione

3A,6A-DIMETHYLPERHYDROPENTALENE-2,5-DIONE

1,5-dimethylbicyclo<3.3.0>octane-3,7-dione

cis-tetrahydro-3a,6a-dimethylpentalene-2,5(1H,3H)-dione

cis-1,5-dimethylbicyclo<3.3.0>octane-3,7-dione

MFCD00003772

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Shanghai Nianxing Industrial Co., Ltd
China
Product Name: cis-1,5-dimethylbicyclo[3.3.0]octane-3,7-dione
Price: Check
Purity: 98.0%
Delivery: 10 Day
Contact: Yang
Email: sales@echemcloud.com

Dayang Chem (Hangzhou) Co., Ltd.
China
Product Name: cis-Tetrahydro-3a,6a-dimethylpentalene-2,5(1H,3H)-dione
Price: $Inquiry/100g $Inquiry/1kg $Inquiry/100kg $Inquiry/1000kg
Purity: 98.0%
Delivery: Inquiry
Contact: Ms Wang
Email: enquiry@dycnchem.com

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Chemical & Physical Properties

MSDS

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Synthetic Route

Precursor & DownStream

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The content on this webpage is sourced from various professional data sources. If you have any questions or concerns regarding the content, please feel free to contact service1@chemsrc.com.