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164268-31-9

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164268-31-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 164268-31-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,6,4,2,6 and 8 respectively; the second part has 2 digits, 3 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 164268-31:
(8*1)+(7*6)+(6*4)+(5*2)+(4*6)+(3*8)+(2*3)+(1*1)=139
139 % 10 = 9
So 164268-31-9 is a valid CAS Registry Number.

164268-31-9Relevant articles and documents

A novel hypervalent iodine reagent prepared from o-iodosylbenzoic acid and trifluoromethanesulfonic acid preparation and reactions of alkynyl(o-carboxyphenyl)iodonium triflates

Kitamura, Tsugio,Nagata, Kensuke,Taniguchi, Hiroshi

, p. 1081 - 1084 (2007/10/02)

A hyervalent iodine reagent prepared from o-iodosylbenzoic acid and trifluoromethanesulfonic acid (TfOH) (1:2) showed a high reactivity toward aromatic substrates, giving aryl(o-carboxyphenyl)iodonium triflates in good to high yields. Treatment of the iodine reagent with 1-trimethylsilylalkynes afforded alkynyliodonium triflates bearing carboxy group in high yields. The alkynyliodonium triflates indicated a high efficiency as a Michael acceptor to nucleophiles and the o-carboxyphenyliodonio group behaved as a good leaving group.

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