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1654021-72-3

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1654021-72-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1654021-72-3 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,6,5,4,0,2 and 1 respectively; the second part has 2 digits, 7 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 1654021-72:
(9*1)+(8*6)+(7*5)+(6*4)+(5*0)+(4*2)+(3*1)+(2*7)+(1*2)=143
143 % 10 = 3
So 1654021-72-3 is a valid CAS Registry Number.

1654021-72-3Downstream Products

1654021-72-3Relevant articles and documents

Multi-gram synthesis of a nucleotide-competing reverse transcriptase inhibitor

Duplessis, Martin,Morency, Louis,James, Clint,Minville, Joannie,Deroy, Patrick,Morin, Sébastien,Thavonekham, Bounkham,Tremblay, Martin,Halmos, Ted,Simoneau, Bruno,Bousquet, Yves,Sturino, Claudio

, p. 2303 - 2307 (2013)

An efficient multi-gram synthesis of a nucleotide-competing reverse transcriptase inhibitor is reported. The synthesis features a chiral auxiliary-assisted alcohol resolution, a Mitsunobu reaction involving a carbamate, followed by a lithium-iodide exchange/Weinreb ketone synthesis tandem. These chemical transformations were optimized in order to increase the yield of the synthesis. The route is concluded by a late-stage palladium-catalyzed cyanation followed by a pyrimidine-2-one ring formation.

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