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139620-40-9

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139620-40-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 139620-40-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,9,6,2 and 0 respectively; the second part has 2 digits, 4 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 139620-40:
(8*1)+(7*3)+(6*9)+(5*6)+(4*2)+(3*0)+(2*4)+(1*0)=129
129 % 10 = 9
So 139620-40-9 is a valid CAS Registry Number.

139620-40-9Downstream Products

139620-40-9Relevant articles and documents

Cyclization of Hindered Fluorinated Dichloro(5- And 6-)alkenyl Radicals. Structural Effects of Olefins on the Selective Formation of 5-exo and 6-endo Cyclization Products

Okano, Takashi,Ishihara, Hidemasa,Takakura, Nobuyuki,Tsuge, Hiroyasu,Eguchi, Shoji,Kimoto, Hiroshi

, p. 7192 - 7200 (2007/10/03)

Reaction of 3-butenyl radicals generated by photolysis of variously substituted Barton esters (both open-chain 1a-d and cyclohexyl 1e-h) with CF2=CCl2 gave a mixture of cyclized products (cyclopentanes 6 and 8 and cyclohexanes 7 and 9) as well as noncyclized products (4 and 5) in various ratios depending on the substitution pattern at the olefinic moiety. The product ratios of [cyclization (6 + 7 + 8 + 9):noncyclization (5)] for 1 with more alkyl substituents on the CC double bond were greater than those for 1 with fewer substituents. The products ratio of [5-exo (6 + 8): 6-endo (7 + 9)] was influenced by a steric effect. Photoreaction of Barton ester 2 with CF2=CCl2 gave a mixture of cyclohexanes 16 and 17 as well as noncyclized 14 and 15. Dehydrochlorination of decalins 7g and 7h followed by oxidation of sulfide and [2,3]sigmatropic rearrangement of the allyl sulfoxide gave octahydronaphthalenones 23 and 27, respectively.

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