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105688-43-5

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105688-43-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 105688-43-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,0,5,6,8 and 8 respectively; the second part has 2 digits, 4 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 105688-43:
(8*1)+(7*0)+(6*5)+(5*6)+(4*8)+(3*8)+(2*4)+(1*3)=135
135 % 10 = 5
So 105688-43-5 is a valid CAS Registry Number.

105688-43-5Relevant articles and documents

Synthesis of γ- and δ-Lactones by Free-Radical Annelation of Se-Phenyl Selenocarbonates

Bachi, Mario D.,Bosch, Eric

, p. 4696 - 4705 (2007/10/02)

A general method for the synthesis of γ- and δ-lactones through the intramolecular addition of alkoxycarbonyl radicals, formed by reaction of Se-phenylselenocarbonates with n-Bu3SnH, onto carbon-carbon multiple bonds is described.This free-radical cyclization is characterized by high regioselectivity favoring exo addition and by a high ratio of cyclization to reduction.Monocyclic, fused bicyclic, and spirocyclic lactones are formed in good to excellent yield.Use of allyltri-n-butyltin as a chain-transfer agent in the place of n-Bu3SnH affords the corresponding 3-butenyl lactones.

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