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13163-89-8

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13163-89-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 13163-89-8 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,3,1,6 and 3 respectively; the second part has 2 digits, 8 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 13163-89:
(7*1)+(6*3)+(5*1)+(4*6)+(3*3)+(2*8)+(1*9)=88
88 % 10 = 8
So 13163-89-8 is a valid CAS Registry Number.

13163-89-8Downstream Products

13163-89-8Relevant articles and documents

Reactions of Enolizable Steroidal 4-En-3-ones and 17-Ones with Hypervalent Iodine

Numazawa, Mitsuteru,Mutsumi, Ayako,Ogata, Mieko

, p. 3381 - 3386 (2007/10/02)

Reaction of the 3-oxo-4-androsten-derivative 1 or 4 with 1.2 eq. of o-iodosylbenzoic acid in methanolic KOH gave the methoxy products, the 4-methoxide 2 or 5 and the 6β-methoxide 3 or 6, along with dehydrated compound, the 4,6-dienone 7 or 8, respectively.Treatment of the 6-methoxide 3 or 6 with trimethylsilyl iodide yielded the 5α-androstane-3,6-dioxo derivative 11 or 12 in high yield.The same hypervalent oxidation of the 17-oxo steroid 15, 18, 21 or 24 using excess iodine and a longer reaction time produced the corresponding 16α-hydroxy-17,17-dimethylacetal 16, 19,22 or 25, which was converted into the 16α-hydroxy-17-one 17, 20, 23 or 26 by treatment with diluted HCl in every case.Keywords - hypervalent iodine oxidation; o-iodosylbenzoic acid; 4-en-3-oxo steroid; 17-oxo steroid; methoxylation; dehydration; 16α-hydroxy-17,17-dimethoxy steroid; 16α-hydroxy-17-oxo steroid; 5α-saturated 3,6-dioxo steroid

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