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4,4,5,5-Tetramethylcyclopentane-1,2,3-trione, also known as pentane-2,4-dione or pentanedione, is an organic compound with the chemical formula C7H10O3. It is a colorless, oily liquid with a pungent odor. 4,4,5,5-tetramethylcyclopentane-1,2,3-trione is a cyclic ketone, featuring a five-membered ring with four methyl groups and three carbonyl groups. It is widely used as a chemical intermediate in the synthesis of various organic compounds, such as fragrances, pharmaceuticals, and agrochemicals. Additionally, it serves as a solvent and a reagent in various chemical reactions. Due to its versatile applications, 4,4,5,5-tetramethylcyclopentane-1,2,3-trione is an important compound in the field of organic chemistry.

1889-98-1

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1889-98-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1889-98-1 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 1,8,8 and 9 respectively; the second part has 2 digits, 9 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 1889-98:
(6*1)+(5*8)+(4*8)+(3*9)+(2*9)+(1*8)=131
131 % 10 = 1
So 1889-98-1 is a valid CAS Registry Number.
InChI:InChI=1/C9H12O3/c1-8(2)6(11)5(10)7(12)9(8,3)4/h1-4H3

1889-98-1SDS

SAFETY DATA SHEETS

According to Globally Harmonized System of Classification and Labelling of Chemicals (GHS) - Sixth revised edition

Version: 1.0

Creation Date: Aug 18, 2017

Revision Date: Aug 18, 2017

1.Identification

1.1 GHS Product identifier

Product name 4,4,5,5-tetramethylcyclopentane-1,2,3-trione

1.2 Other means of identification

Product number -
Other names tetramethyl-cyclopentane-1,2,3-trione

1.3 Recommended use of the chemical and restrictions on use

Identified uses For industry use only.
Uses advised against no data available

1.4 Supplier's details

1.5 Emergency phone number

Emergency phone number -
Service hours Monday to Friday, 9am-5pm (Standard time zone: UTC/GMT +8 hours).

More Details:1889-98-1 SDS

1889-98-1Downstream Products

1889-98-1Relevant academic research and scientific papers

Ene Reactions of Indane-1,2,3-trione (a Super-enophile) and Related Vicinal Tricarbonyl Systems

Gill, G. Bryon,Idris, Muhammad S. Hj.,Kirollos, Kirollos S.

, p. 2355 - 2366 (2007/10/02)

Indane-1,2,3-trione 1 is conveniently prepared in quantitative yield by the azeotropic drying of ninhydrin 2 using chlorobenzene as solvent.The central C=O group of the trione is extremely electrophilic and ene addition occurs at this site with a wide range of alkenes and with terminal alkynes in aprotic solvents at moderate temperatures (70-130 deg C).The reactivity of trione 1 is somewhat attenuated by the solvent, and the ene additions are consistently faster in chloroform than in tetrahydrofuran.Stereoselectivity, when relevant, appears largely to be dictated bysteric factors.Regiochemical control can be exercised if the ene contains two reaction sites.Isoprene and 2,4-dimethylpenta-1,3-diene, however, react by Diels-Alder rather than by ene addition; the adducts are the expected regioisomers 18 and 20, respectively.Attempts to catalyse the ene reactions with Lewis acids were unsuccessful.The analogous ene reactions of 4,4,5,5-tetramethyl-cyclopentane-1,2,3-trione 44, 4,4,6,6-tetramethylcyclohexane-1,2,3-trione 45, and 2,2-dimethyl-1,3-dioxane-4,5,6-trione ('oxo-Meldrum's acid') 46 were also briefly investigated.

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