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1039-22-1

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1039-22-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1039-22-1 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 1,0,3 and 9 respectively; the second part has 2 digits, 2 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 1039-22:
(6*1)+(5*0)+(4*3)+(3*9)+(2*2)+(1*2)=51
51 % 10 = 1
So 1039-22-1 is a valid CAS Registry Number.

1039-22-1Relevant articles and documents

Formation of 17beta-alkoxy-16-keto steroids by reaction of 16alpha-hydroxy-17-keto and 17beta-hydroxy-16-keto steroids with trimethylsilyl iodide in the presence of alkyl alcohols.

Nagaoka,Endo,Numazawa

, p. 1215 - 1218 (2000)

16Alpha-hydroxy-17-keto steroids, 1, 3, and 8, and their 17beta-hydroxy-16-keto isomers, 4, 5, and 9, were transformed into the corresponding 17beta-alkoxy-16-keto derivatives on treatment with trimethylsilyl iodide (TMSI) in the presence of alkyl alcohol in CHCl3 in poor to high yields.

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