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1422953-20-5

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1422953-20-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1422953-20-5 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,4,2,2,9,5 and 3 respectively; the second part has 2 digits, 2 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 1422953-20:
(9*1)+(8*4)+(7*2)+(6*2)+(5*9)+(4*5)+(3*3)+(2*2)+(1*0)=145
145 % 10 = 5
So 1422953-20-5 is a valid CAS Registry Number.

1422953-20-5Relevant articles and documents

Synthetic studies towards NG-121: Diastereoselective synthesis of NG-121 methyl ether

Singh, Mandeep,Argade, Narshinha P.

, p. 3797 - 3804 (2013/02/22)

Starting from unsymmetrically O-protected methyl 4-bromo-3,5- dihydroxybenzoate, a facile synthesis of the methyl ether of bioactive natural product NG-121 was accomplished in very good overall yield. The key steps were: Stille coupling reaction of the farnesyl unit with the electron-rich phenolic segment; hydroxy-directed selective epoxidation of the farnesyl chain along with concomitant phenol-driven intramolecular regio- and diastereoselective ring closure to the corresponding hydroxybenzopyran; and regioselective formylation followed by in situ reductive lactonization. Georg Thieme Verlag KG · Stuttgart · New York.

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