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118739-67-6

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118739-67-6 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 118739-67-6 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,1,8,7,3 and 9 respectively; the second part has 2 digits, 6 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 118739-67:
(8*1)+(7*1)+(6*8)+(5*7)+(4*3)+(3*9)+(2*6)+(1*7)=156
156 % 10 = 6
So 118739-67-6 is a valid CAS Registry Number.

118739-67-6Relevant articles and documents

INTRAMOLECULAR CYCLOADDITIONS OF ARYLKETENES WITH ALKENES. REACTIONS OF 5-ARYLBICYCLOHEPTAN-6-ONES.

Snider, Barry B.,Niwa, Maho

, p. 3175 - 3178 (2007/10/02)

Intramolecular cycloadditions of arylketenes 4 proceed in excellent yield to give 5-arylbicycloheptan-6-ones 5.Reaction of 5a with KOH in THF gives a 95:5 mixture of 7 and 10.Reaction of 5a with KOEt in ETOH give a 1:3 mixture of 7 and 10.Reaction of 5a with vinyllithium and treatment of the resulting alcohol 23 with KH gives the 1,3-sigmatropic rearrangement product 25.

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