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77001-22-0

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77001-22-0 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 77001-22-0 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,7,0,0 and 1 respectively; the second part has 2 digits, 2 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 77001-22:
(7*7)+(6*7)+(5*0)+(4*0)+(3*1)+(2*2)+(1*2)=100
100 % 10 = 0
So 77001-22-0 is a valid CAS Registry Number.

77001-22-0Relevant articles and documents

Synthesis and Properties of O6-Substituted Guanosine Derivatives

Daskalov, Hristo Petrov,Sekine, Mitsuo,Hata, Tsujiaki

, p. 3076 - 3083 (2007/10/02)

Reactions of 2',3',5'-tri-O-acetyl-N2-protected or unprotected guanosine derivatives with phosphoryl, phosphinothioyl, arylsulfonyl, and silyl halides in dichloromethane gave the corresponding O6-substituted guanosine derivatives in good yields.In these reactions, 4-(dimethylamino)pyridine (DMAP) was found to be very effective catalyst.The physical data of these products and their stabilities under acidic and basic conditions were described in detail.Selective detritylation of O6-arylsulfonyl-N2-tritylguanosinde derivatives was accomplished by treatment with 80percent aceti c acid.It was found that O6-dibutylphosphinothioyl derivatives were relatively stable under conditions where acetyl group was predominantly removed.

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