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156370-61-5

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156370-61-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 156370-61-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,5,6,3,7 and 0 respectively; the second part has 2 digits, 6 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 156370-61:
(8*1)+(7*5)+(6*6)+(5*3)+(4*7)+(3*0)+(2*6)+(1*1)=135
135 % 10 = 5
So 156370-61-5 is a valid CAS Registry Number.

156370-61-5Relevant articles and documents

Functionalized organolithium compounds of DTBB-catalyzed sulfur-lithium exchange

Foubelo, Francisco,Gutiérrez, Ana,Yus, Miguel

, p. 503 - 514 (2007/10/03)

The successive reaction of β- or γ-hydroxy or amino phenyl thioethers (1,4) with butyllithium and an excess of lithium powder in the presence of a catalytic amount of DTBB in THF at - 78°C leads to the formation of the corresponding β- or γ-functionalized organolithium compounds 2 or 5, respectively, which by treatment with different electrophiles [D2O, t- BuCHO, PhCHO, Me2CO, (CH2)4CO, (CH2)5CO] at temperatures ranging between - 78°C and room temperature yields, after hydrolysis with water, the expected functionalized alcohols or amines 3 or 6, respectively, in a completely regioselective manner.

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