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1431561-98-6

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1431561-98-6 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1431561-98-6 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,4,3,1,5,6 and 1 respectively; the second part has 2 digits, 9 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 1431561-98:
(9*1)+(8*4)+(7*3)+(6*1)+(5*5)+(4*6)+(3*1)+(2*9)+(1*8)=146
146 % 10 = 6
So 1431561-98-6 is a valid CAS Registry Number.

1431561-98-6Downstream Products

1431561-98-6Relevant articles and documents

Substituted 2,2′-bipyrroles and pyrrolylfurans via intermediate isoxazolylpyrroles

Frederich, James H.,Matsui, Jennifer K.,Chang, Randy O.,Harran, Patrick G.

supporting information, p. 2645 - 2647 (2013/06/26)

We describe a new synthesis of the 3-chloro-(4′-methoxy)-2,2′- pyrrolylfuran segment (3) of (+)-roseophilin. The route exploits a isoxazoylpyrrole intermediate, wherein the isoxazole ring serves as a β-diketone equivalent and a directing group for palladium catalyzed chlorination of the attached pyrrole. Subsequent reduction of the N-O bond and acid promoted cyclization afford roseophilin segment 3b in five steps and 19% overall yield. This strategy was extended to the synthesis of 3-chloro-(4′-alkoxy)-2,2′-pyrrolylfurans (16a-c) and 4-alkoxy-2,2′-bipyrroles (20a-c), which are building blocks to synthesize bioactive prodiginine natural products and their congeners.

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