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159764-43-9

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159764-43-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 159764-43-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,5,9,7,6 and 4 respectively; the second part has 2 digits, 4 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 159764-43:
(8*1)+(7*5)+(6*9)+(5*7)+(4*6)+(3*4)+(2*4)+(1*3)=179
179 % 10 = 9
So 159764-43-9 is a valid CAS Registry Number.

159764-43-9Relevant articles and documents

Mechanism of the Rearrangement of 2-(Vinyloxy)alkyl to 4-Ketobutyl Radicals

Crich, David,Yao, Qingwei

, p. 12305 - 12312 (1994)

The rearrangement of 2-(vinyloxy)alkyl to 4-ketobutyl radicals has been demonstrated to proceed by a two step mechanism involving initial 5-endo-trigonal cyclization to give a tetrahydrofuranyl radical which then fragments to the final radical.Fragmentation of the tetrahydrofuranyl radicals is demonstrated by their generation from the corresponding 2-(ethylthio)-tetrahydrofurans with stannanes and AIBN.The rearrangement reaction is completely blocked when the intermediate tetrahydrofuranyl radical is set up to undergo a 5-hexenyl rearrangement.

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