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81939-86-8

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81939-86-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 81939-86-8 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,1,9,3 and 9 respectively; the second part has 2 digits, 8 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 81939-86:
(7*8)+(6*1)+(5*9)+(4*3)+(3*9)+(2*8)+(1*6)=168
168 % 10 = 8
So 81939-86-8 is a valid CAS Registry Number.

81939-86-8Downstream Products

81939-86-8Relevant articles and documents

Cytochalasin Support Studies. The C14-C19 Subunit of Cytochalasin C. Intramolecular 2 + 2 Photochemical Cycloaddition of Vinyl Sulfones

Musser, Arlene K.,Fuchs, P. L.

, p. 3121 - 3131 (2007/10/02)

An intramolecular 2? + 2? photochemical cycloaddition between a six-membered ring vinyl sulfone and a five-membered ring vinylogous ester is described.The process occurs with moderate regiospecificity, the direction being controlled by a cis-acetonide moiety on the six-membered ring.Attempts to fragment the β-alkoxy sulfone adduct to trigger a DeMayo ring expansion were unsuccessful.

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