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271600-97-6

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271600-97-6 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 271600-97-6 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,7,1,6,0 and 0 respectively; the second part has 2 digits, 9 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 271600-97:
(8*2)+(7*7)+(6*1)+(5*6)+(4*0)+(3*0)+(2*9)+(1*7)=126
126 % 10 = 6
So 271600-97-6 is a valid CAS Registry Number.

271600-97-6Relevant articles and documents

Inter- and intramolecular Mitsunobu reaction based approaches to 2-substituted chromans and chroman-4-ones

Hodgetts, Kevin J.

, p. 6860 - 6870 (2007/10/03)

Two approaches to optically active 2-substituted chromans and chroman-4-ones are described. The first utilized an intermolecular Mitsunobu reaction of a homochiral halopropanol and 2-bromophenol followed by cyclization to the 2-substituted chroman. In addition, a double lithiation procedure was developed to introduce additional functionality to the chroman. The second approach utilized an intramolecular Mitsunobu cyclization to give the 2-substituted chroman-4-one nucleus. The methodologies were applied to the syntheses of several biologically active natural and synthetic products.

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