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1392228-32-8

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1392228-32-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1392228-32-8 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,3,9,2,2,2 and 8 respectively; the second part has 2 digits, 3 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 1392228-32:
(9*1)+(8*3)+(7*9)+(6*2)+(5*2)+(4*2)+(3*8)+(2*3)+(1*2)=158
158 % 10 = 8
So 1392228-32-8 is a valid CAS Registry Number.

1392228-32-8Relevant articles and documents

Scalable synthesis of substituted 2,7-dimethyl-9-phenylxanthen-9-ol (DMPx-OH): Useful for the preparation of crystalline 5′-O-DMPx-protected nucleosides

Banerjee, Shyamapada,Srishylam,Rajendra Prasad,Migawa, Michael T.,Swayze, Eric E.,Sanghvi, Yogesh S.

experimental part, p. 4669 - 4672 (2012/09/07)

A convenient single-step synthesis of several 2,7-dimethyl-9-phenylxanthen- 9-ol (DMPx-OH) analogs has been accomplished using a Friedel-Crafts reaction. Treatment of various DMPx-OH with unprotected 2′-O-methoxyethyl- ribonucleosides (MOE) in the presence of B(C6F5) 3, as a Lewis Acid catalyst, furnished 5′-O-protected derivatives of 2′-MOE-ribonucleosides in good yields. The deprotection of the DMPx groups was accomplished by acid hydrolysis under very mild conditions. Among the five DMPx analogs synthesized, the 2,7-dimethyl-9-(4-nitrophenyl) xanthene-9-yl group furnished crystalline products enabling non-chromatographic isolation of 5′-O-protetced nucleosides.

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