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125973-34-4

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125973-34-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 125973-34-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,2,5,9,7 and 3 respectively; the second part has 2 digits, 3 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 125973-34:
(8*1)+(7*2)+(6*5)+(5*9)+(4*7)+(3*3)+(2*3)+(1*4)=144
144 % 10 = 4
So 125973-34-4 is a valid CAS Registry Number.

125973-34-4Relevant articles and documents

A one-flask synthesis of dihydronaphthalenemethanols by directed addition of organolithium reagents to BHA naphthalenecarboxylates

Shindo, Mitsuru,Koga, Kenji,Asano, Yasutomi,Tomioka, Kiyoshi

, p. 4955 - 4968 (2007/10/03)

The 1,4-addition reaction of organolithium reagents with 2,6-bis(tert- butyl)-4-methoxyphenyl naphthalenecarboxylates gave regioselectively substituted dihydronaphthalenecarboxylates in high yields. Successive treatment of the esters with organolithiums in THF, lithium triethylborohydride, methyl iodide, and finally sodium borohydride in methanol, provided vegio- and stereoselectively the corresponding 1,1,2- and 1,2,2-trisubstituted dihydronaphthalenylmethanols in good yields. This one- flask process is constituted from a sequence of five reactions involving a reductive generation of an aldehyde metal enolate from a ketene as the key step.

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