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127333-83-9

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127333-83-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 127333-83-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,2,7,3,3 and 3 respectively; the second part has 2 digits, 8 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 127333-83:
(8*1)+(7*2)+(6*7)+(5*3)+(4*3)+(3*3)+(2*8)+(1*3)=119
119 % 10 = 9
So 127333-83-9 is a valid CAS Registry Number.

127333-83-9Relevant articles and documents

Preparation of eight-membered cyclic ethers by Lewis acid promoted acetal-alkene cyclizations

Blumenkopf, Todd A.,Bratz, Matthias,Casta?eda, Armando,Look, Gary C.,Overman, Larry E.,Rodriguez, Domingo,Thompson, Andrew S.

, p. 4386 - 4399 (1990)

The Lewis acid promoted cyclization of 20 5-alkenyl acetals is reported. Oxocenes with Δ4 unsaturation (3,6,7,8-tetrahydro-2H-oxocins) can be accessed in this convenient fashion with moderate to excellent efficiency and with perfect regiochemic

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