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2,3-Dihydrospiro<<1H>-indene-1,2'-<2H>inden>-1'(3'H)-dione is a chemical with a specific purpose. Lookchem provides you with multiple data and supplier information of this chemical.

127972-64-9

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127972-64-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 127972-64-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,2,7,9,7 and 2 respectively; the second part has 2 digits, 6 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 127972-64:
(8*1)+(7*2)+(6*7)+(5*9)+(4*7)+(3*2)+(2*6)+(1*4)=159
159 % 10 = 9
So 127972-64-9 is a valid CAS Registry Number.

127972-64-9Downstream Products

127972-64-9Relevant academic research and scientific papers

Wittig-Horner reaction of dimethyl phthalide-3-phosphonates with ketones: Synthesis of 3-ylidenephthalides and their conversion to 2,2-disubstituted indan-1,3-diones including spirocyclic compounds

Watanabe,Morimoto,Tomoda,Iwanaga

, p. 1083 - 1086 (1994)

The Wittig-Horner reaction of dimethyl phthalide-3-phosphonates with various ketones was investigated under the conditions: lithium bis(trimethylsilyl)amide (LHMDS) or sodium hydride in tetrahydrofuran, and cesium carbonate in isopropyl alcohol. The sequential treatment of the 3-ylidenephthalides with diisobutylaluminium hydride (DIBAL-H) and pyridinium dichromate (PDC) afforded 2,2-disubstituted indan-1,3-dione derivatives in modest to high overall yields.

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