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137897-38-2

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137897-38-2 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 137897-38-2 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,7,8,9 and 7 respectively; the second part has 2 digits, 3 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 137897-38:
(8*1)+(7*3)+(6*7)+(5*8)+(4*9)+(3*7)+(2*3)+(1*8)=182
182 % 10 = 2
So 137897-38-2 is a valid CAS Registry Number.

137897-38-2Relevant articles and documents

New Trialkylsilyl Enol Ether Chemistry: Direct 1,2-Bis-azidonation of Triisopropylsilyl Enol Ethers: an Azido-radical Addition Process Promoted by TEMPO

Magnus, Philip,Roe, Michael B.,Hulme, Christopher

, p. 263 - 266 (1995)

Treatment of triisopropylsilyl enol ethers with PhIO/TMSN3/TEMPO(cat.) -45 deg C results in 1,2-bis-azidonation, which appears to occur through a radical addition process; the 1-azido group can be replaced by carbon nucleophiles such as allyl,

Hypervalent iodine chemistry: New oxidation reactions using the iodosylbenzene-trimethylsilyl azide reagent combination. Direct α- and β-azido functionalization of triisopropylsilyl enol ethers

Magnus, Philip,Lacour, Jér?me,Evans, P. Andrew,Roe, Michael B.,Huhne, Christopher

, p. 3406 - 3418 (2007/10/03)

Treatment of triisopropylsilyl (TIPS) enol ethers with PhIO/TMSN3/at -18 to -15°C rapidly (5 min) gave β-azido TIPS enol ethers in high yields, with only traces of the α-azido adduct. The reaction is very sensitive to temperature changes, with

New trialkylsilyl enol ether chemistry. Direct β-azido functionalization of triisopropylsilyl enol ethers

Magnus, Philip,Lacour, Jér?me

, p. 767 - 769 (2007/10/02)

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