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1355990-15-6

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1355990-15-6 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1355990-15-6 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,3,5,5,9,9 and 0 respectively; the second part has 2 digits, 1 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 1355990-15:
(9*1)+(8*3)+(7*5)+(6*5)+(5*9)+(4*9)+(3*0)+(2*1)+(1*5)=186
186 % 10 = 6
So 1355990-15-6 is a valid CAS Registry Number.

1355990-15-6Relevant articles and documents

Synthesis Of Treprostinil And Intermediates Useful Therein

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, (2014/01/08)

Treprostinil is prepared by a process which involves Pauson-Khan cyclization of an an alkene-substituted, alkyne-substituted benzene corresponding to formula: (I) where PMB represents para-methoxy benzyl protecting group and R1 and R2 are alcohol protecting groups. Following cyclization, the resulting compound can be subjected to several chemical trans-formations followed by alkylation, hydrolysis and salt formation to yield treprostinil sodium. The use of para-methoxybenzyl group as the phenolic protecting group confers several process advantages that result in simplified purification of the final product and improved yields.

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