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111875-02-6

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111875-02-6 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 111875-02-6 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,1,1,8,7 and 5 respectively; the second part has 2 digits, 0 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 111875-02:
(8*1)+(7*1)+(6*1)+(5*8)+(4*7)+(3*5)+(2*0)+(1*2)=106
106 % 10 = 6
So 111875-02-6 is a valid CAS Registry Number.

111875-02-6Relevant articles and documents

Efficient and suitable preparation of N-sulfonyl-1,2,3,4- tetrahydroisoquinolines and ring analogues using recyclable H6P 2W18O62·24H2O/SiO 2 catalyst

Pasquale, Gustavo,Ruiz, Diego,Autino, Juan,Baronetti, Graciela,Thomas, Horacio,Romanelli, Gustavo

, p. 758 - 763 (2012/10/29)

Silica gel-supported H6P2W18O 62·24H2O is an efficient and recyclable catalyst for the synthesis of biologically important molecules. Several substituted N-sulfonyl-1,2,3,4-tetrahydroisoquinolines and ring analogues can be prepared in very good yields and purity by direct reaction of N-aralkylsulfonamides and sym-trioxane by a Pictet-Spengler reaction in the presence of a catalytic amount of silica gel-supported H6P2W18O 62·24H2O. Reactions were performed in a low volume of toluene, at 70 °C and for a short time, typically 15 to 30 min. The title heterocyclic compounds were prepared in very good yields (60%-95%) using the described procedure results in a clean and useful alternative, which has the advantages of a greener methodology with operative simplicity, use of a reusable and non-corrosive solid catalyst, soft reaction conditions, low reaction times, and good yields.

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