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135197-44-3

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135197-44-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 135197-44-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,5,1,9 and 7 respectively; the second part has 2 digits, 4 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 135197-44:
(8*1)+(7*3)+(6*5)+(5*1)+(4*9)+(3*7)+(2*4)+(1*4)=133
133 % 10 = 3
So 135197-44-3 is a valid CAS Registry Number.

135197-44-3Relevant articles and documents

Process for the preparation of 9-deazaguanine derivatives

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Page 11, (2010/02/09)

Derivatives of 9-deazaguanine are prepared by reacting an aldehyde or ketone with a dialkylaminomalonate to form the corresponding enamine. The enamine is then reacted with a base to form a cyclic pyrrole. The cyclic pyrrole is reacted with an urea compound or a derivative of carbamimidoic acid to provide a protected guanidino compound. The guanidino is converted to the desired 9-deazaguanine derivative by reacting with trifluoracetic acid or with an alkoxide or hydroxide followed by neutralization with an acid.

Structure-based design of inhibitors of purine nucleoside phosphorylase. 2. 9-Alicyclic and 9-heteroalicyclic derivatives of 9-deazaguanine

Secrist III,Niwas,Rose,Babu,Bugg,Erion,Guida,Ealick,Montgomery

, p. 1847 - 1854 (2007/10/02)

Alicyclic and heteroalicyclic derivatives of 9-deazaguanine (2-amino-1,5- dihydro-4H-pyrrolo[3,2-d][pyrimidin-4-one) are, with one exception, potent inhibitors of purine nucleoside phosphorylase (PNP) equaling the corresponding 9-arylmethyl derivatives pr

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