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103408-53-3

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103408-53-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 103408-53-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,0,3,4,0 and 8 respectively; the second part has 2 digits, 5 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 103408-53:
(8*1)+(7*0)+(6*3)+(5*4)+(4*0)+(3*8)+(2*5)+(1*3)=83
83 % 10 = 3
So 103408-53-3 is a valid CAS Registry Number.

103408-53-3Upstream product

103408-53-3Relevant articles and documents

Phosphoramidite compounds and process for production thereof

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, (2008/06/13)

Phosphoramidite compounds of the general formula STR1 wherein each of R1 and R2 represents a hydroxyl group having a protective group, or the group --OR4, R3 represents a hydrogen atom, a hydroxyl group having a protective group, or the group --OR4, R4 represents the group STR2 X represents a secondary amino group, R5 represents an allylic residue or a protective group capable of being split off by beta-cleavage, and BAOC represents a nucleoside base residue in which the amino or imino group is protected with an allyloxycarbonyl-type residue, with the proviso that only one of R1, R2 and R3 represents the group--OR4. The compounds can be produced by reacting a nucleoside represented by the general formula STR3 wherein each of R1 ' and R2 ' represents a hydroxyl group which may have a protective group, R3 ' represents a hydrogen atom, or a hydroxyl group which may have a protective group, and BAOC is as defined, with the proviso that only one of R1 ', R2 'and R3 ' is a hydroxyl group, with a phosphoramide compound represented by the general formula STR4 wherein X and R5 are as defined, and Y represents a secondary amino group or a halogen atom.

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