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119628-74-9

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119628-74-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 119628-74-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,1,9,6,2 and 8 respectively; the second part has 2 digits, 7 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 119628-74:
(8*1)+(7*1)+(6*9)+(5*6)+(4*2)+(3*8)+(2*7)+(1*4)=149
149 % 10 = 9
So 119628-74-9 is a valid CAS Registry Number.

119628-74-9Relevant articles and documents

Crystal and molecular structutre of 2,2,2,4-tetraphenyl-5-methoxycarbonyl-1,3,2λ5-oxazaphospholidine, C28H26NO3P

Smits, J. M. M.,Beurskens, Paul T.,Thijs, L.,Loon, A. A. W. M. van,Zwanenburg, B.

, p. 625 - 632 (1988)

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Synthesis of all four homochiral stereoisomers of methyl 3-phenyl-1H-aziridine-2-carboxylate

Thijs, Lambertus,Orskamp Jos,Adriaan,Marielle,Eenstra, Rolf W.,Legters, Johan,Zwanenburg, Binne

, p. 2611 - 2622 (2007/10/02)

Sodium -E3-phenylglycidate (±)-2E was prepared using the Darzens' procedure. Classical resolution with 1-phenylethylamine afforded optically pure salts (+)-(2S,3R)-2E and (-)-(2R,3S)-2E. Alternatively, (±)-2E was converted into (±)-2Z by ring opening of ethyl ester (±)1E with hydrogen bromide, followed by recyclization and saponification. Classical resolution of (±)-2Z with ephedrine afforded optically pure salts (+)-(2S,3S)-2Z and (-)-(2R,3R)-2Z Treatment of the four sodium salts with sodium azide followed by esterification gave hydroxy azido esters 3, which were finally converted into the four homochiral stereoisomers of methyl 3-phenyl-1H-aziridine-2-carboxylate 5 in a reaction with triphenylphosphine and subsequent heating of the initially formed oxazaphospholidines 4.

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