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180283-48-1

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180283-48-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 180283-48-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,8,0,2,8 and 3 respectively; the second part has 2 digits, 4 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 180283-48:
(8*1)+(7*8)+(6*0)+(5*2)+(4*8)+(3*3)+(2*4)+(1*8)=131
131 % 10 = 1
So 180283-48-1 is a valid CAS Registry Number.

180283-48-1Relevant articles and documents

Synthesis of N-protected 2-hydroxymethylpyrroles and transformation into acyclic oligomers

Tietze, Lutz F.,Kettschau, Georg,Heitmann, Katja

, p. 851 - 857 (1996)

The synthesis of N-tosylated and N-Boc-protected 2-hydroxymethyl-pyrroles 2a-c and 3a-d and their transformation into di- and tripyrroles 18, 20a and 20b as well as the preparation of the vinyl- and ethynylpyrroles 13a, 13b and 15 is described. The pyrrole-2-carboxylic acid ethyl esters 7a and b and the pyrrole-2-carbaldehydes 4a-d were transformed into their N-protected derivatives 5a, 5b, 6a-d, 8a and 8b in 69-97% yield and reduced to give the corresponding hydroxymethylpyrroles 2a-c and 3a-d in 79-96% yield; treatment of 2b with 17, 19a and 19b in 0.5% hydrochloric acid gives the dipyrrole 18 and the tripyrroles 20a and 20b in 20-28% yield.

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