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693253-03-1

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693253-03-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 693253-03-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,9,3,2,5 and 3 respectively; the second part has 2 digits, 0 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 693253-03:
(8*6)+(7*9)+(6*3)+(5*2)+(4*5)+(3*3)+(2*0)+(1*3)=171
171 % 10 = 1
So 693253-03-1 is a valid CAS Registry Number.

693253-03-1Upstream product

693253-03-1Downstream Products

693253-03-1Relevant articles and documents

A stereoselective synthesis of 9-(3-O-benzyl-5-O-tetrahydropyranyl-β- D-arabinofuranosyl)adenine, a potentially useful intermediate for ribonucleoside synthesis

Woltermann, Christopher J.,Lapin, Yuri A.,Kunnen, Kevin B.,Tueting, David R.,Sanchez, Ignacio H.

, p. 3445 - 3449 (2004)

A novel synthesis for preparing 9-(3-O-benzyl-5-O-tetrahydropyranyl-β- D-arabinofuranosyl)adenine (6) has been developed which does not require sub zero temperatures or exotic reagents. A key step in this synthesis is the selective protection of the 3′-OH of ara-A with a benzyl group. The 5′-OH is then selectively protected with DHP to yield 6, a potentially useful intermediate. A synthesis of 9-(2,3-dideoxy-2-fluoro-β-D-threo- pentofuranosyl)adenine (1, FddA), an anti-viral compound, is given to illustrate the utility of this new approach.

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