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23693-78-9

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23693-78-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 23693-78-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,3,6,9 and 3 respectively; the second part has 2 digits, 7 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 23693-78:
(7*2)+(6*3)+(5*6)+(4*9)+(3*3)+(2*7)+(1*8)=129
129 % 10 = 9
So 23693-78-9 is a valid CAS Registry Number.

23693-78-9Relevant articles and documents

A mild and convenient oxidation of H-phosphinic acids

Berlicki,Mucha,Kafarski

, p. 1959 - 1962 (2008/09/19)

A new mild and convenient method of oxidation of H-phosphinic to the corresponding phosphonic acids was developed. Conversion of H-phosphinic acids into trivalent trimethylsilyl esters using hexamethyldisilazane, followed by their oxidation with air and subsequent methanolysis allowed obtaining the final compounds in good to excellent yields. The methodology was proved to be particularly useful for N-benzyloxycarbonyl-α-aminophosphinic acids. The scope and limitations of the reaction were additionally tested using a variety of both free and protected amino- and hydroxyphosphinates as substrates.

Substituted aminoalkanoylaminoalkyl phosphonate angiotensin converting enzyme inhibitors

-

, (2008/06/13)

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