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404356-54-3

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404356-54-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 404356-54-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 4,0,4,3,5 and 6 respectively; the second part has 2 digits, 5 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 404356-54:
(8*4)+(7*0)+(6*4)+(5*3)+(4*5)+(3*6)+(2*5)+(1*4)=123
123 % 10 = 3
So 404356-54-3 is a valid CAS Registry Number.

404356-54-3Downstream Products

404356-54-3Relevant articles and documents

Syntheses of differentially protected isocoumarins

Lowell, Andrew N.,Wall, Philip D.,Waters, Stephen P.,Kozlowski, Marisa C.

experimental part, p. 5573 - 5582 (2010/10/01)

Syntheses of an isocoumarin subunit suitable for the completion of purpuromycin are outlined. Specifically, work targeting an orthogonally protected isocoumarin (eventually 12% yield over 12 steps) and an improved synthesis of a symmetrically protected isocoumarin (18% over 10 steps) are described. A new modification for selective catechol protection as mediated by potassium bicarbonate is also presented along with insights into oxidative and reductive functionalization of isocoumarins.

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