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Toluene-4-sulfonic acid (S)-2,2-dimethyl-4-(3-oxo-butyl)-[1,3]dioxolan-4-ylmethyl ester is a chemical with a specific purpose. Lookchem provides you with multiple data and supplier information of this chemical.

128766-40-5

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128766-40-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 128766-40-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,2,8,7,6 and 6 respectively; the second part has 2 digits, 4 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 128766-40:
(8*1)+(7*2)+(6*8)+(5*7)+(4*6)+(3*6)+(2*4)+(1*0)=155
155 % 10 = 5
So 128766-40-5 is a valid CAS Registry Number.

128766-40-5Relevant academic research and scientific papers

C-H insertion method for the chiral tertiary alcohol: Formal synthesis of (-)-frontalin

Ohira, Susumu,Ishi, Satoshi,Shinohara, Koji,Nozaki, Hiroshi

, p. 1039 - 1040 (1990)

Intramolecular insertion of the alkylidene carbene into C - H bond adjacent to the protected secondary hydroxyl group gave a chiral tertiary alcohol derivative, which was converted to a synthetic intermediate of (-)-frontalin.

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