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23995-20-2

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23995-20-2 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 23995-20-2 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,3,9,9 and 5 respectively; the second part has 2 digits, 2 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 23995-20:
(7*2)+(6*3)+(5*9)+(4*9)+(3*5)+(2*2)+(1*0)=132
132 % 10 = 2
So 23995-20-2 is a valid CAS Registry Number.

23995-20-2Downstream Products

23995-20-2Relevant articles and documents

5-(Methylthio)tetrazoles as versatile synthons in the stereoselective synthesis of polycyclic pyrazolines via photoinduced intramolecular nitrile imine-alkene 1,3-dipolar cycloaddition

Pla, Daniel,Tan, Derek S.,Gin, David Y.

, p. 2407 - 2415 (2014/05/20)

A key thioether substituent in readily accessible 2-alkyl-5-(methylthio) tetrazoles enables facile photoinduced denitrogenation and intramolecular nitrile imine 1,3-dipolar cycloaddition to afford a wide range of polycyclic pyrazoline products with excellent diastereoselectivity. The methylthio group red-shifts the UV absorbance of the tetrazole, obviating the requirement in all previous substrate systems for at least one aryl substituent, and can subsequently be converted into a variety of other functionalities. This synthetic platform has been applied to the concise total syntheses of the alkaloid natural products (±)-newbouldine and withasomnine. This journal is the Partner Organisations 2014.

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