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5688-09-5

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5688-09-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 5688-09-5 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 5,6,8 and 8 respectively; the second part has 2 digits, 0 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 5688-09:
(6*5)+(5*6)+(4*8)+(3*8)+(2*0)+(1*9)=125
125 % 10 = 5
So 5688-09-5 is a valid CAS Registry Number.

5688-09-5Relevant articles and documents

Oxetane synthesis via cyclisation of aryl sulfonate esters on polystyrene and PEG polymeric supports

Behrendt, Jonathan M.,Bala, Kason,Golding, Peter,Hailes, Helen C.

, p. 643 - 645 (2005)

The addition of suitably protected pentaerythritols to polymer supported sulfonyl chloride with subsequent alkoxide formation and intramolecular cyclisation to generate oxetanes is described. This convenient method for the preparation of oxetanes has seve

Tosyl Group Transfer with O,O'-Ditosylethyleneglycol

Weber, Edwin

, p. 1551 - 1553 (2007/10/02)

The ability of O,O'-ditosylethyleneglycol (2a) to act as tosyl group transfer reagent to neopentyl type alcohols is described.Starting from 1a the spirooxetane 3 can be synthesized via tosyl group transfer in high yield. 4a by double tosyl transfer yields

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