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5,5-Ethylenedioxy-7a-methyl-4,5,6,7-tetrahydro-2H-inden-1(7aH)-one is a complex organic compound with the molecular formula C13H14O3. It is a derivative of the indene class of compounds, characterized by a seven-membered ring structure with a methyl group at the 7a position. The molecule features a tetrahydro (partially saturated) structure, an ethylenedioxy bridge (two oxygen atoms connected by a methylene group) at the 5,5 position, and a ketone functional group at the 1(7aH) position. 5,5-ethylenedioxy-7a-methyl-4,5,6,7-tetrahydro-2H-inden-1(7aH)-one is of interest in organic chemistry and may have potential applications in various fields, such as pharmaceuticals or materials science, due to its unique structure and properties.

6822-78-2

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6822-78-2 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 6822-78-2 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 6,8,2 and 2 respectively; the second part has 2 digits, 7 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 6822-78:
(6*6)+(5*8)+(4*2)+(3*2)+(2*7)+(1*8)=112
112 % 10 = 2
So 6822-78-2 is a valid CAS Registry Number.

6822-78-2Relevant academic research and scientific papers

The Course of Cyclic Ethylene Acetal Formation from 7a-Methyl-2,3,7,7a-tetrahydro-1H-indene-1,5(6H)-dione

Brown, Roger F. C.,Burge, Geoffrey L.,Collins, David J.

, p. 117 - 134 (2007/10/02)

All attemps to convert the dione (1a) into the 5-monoacetal (8) by direct ethylene acetal formation under mild conditions have led to complex mixtures usually containing the required monoacetal (8), its conjugated enone isomer (9), the diacetal (5) and the 1-monoacetal (2).The diacetal (5) readily forms a dimer (4) in the presence of anhydrous acid, but in dioxan containing aqueous sulfuric acid it is hydrolysed to the 5-monoacetal (8), isolated in 68percent yield after chromatographic separation from the dione (1a).For preparative purposes the most convenient and reliable method for the preparation of (8) is conversion of (1a) into the 1-cyanohydrin (34), formation of the corresponding 5-acetal (36), and elimination of HCN from the 1-cyanohydrin group with pyridine; this gave the 5-monoacetal (8) in 66percent overall yield.

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