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736140-69-5

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736140-69-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 736140-69-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 7,3,6,1,4 and 0 respectively; the second part has 2 digits, 6 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 736140-69:
(8*7)+(7*3)+(6*6)+(5*1)+(4*4)+(3*0)+(2*6)+(1*9)=155
155 % 10 = 5
So 736140-69-5 is a valid CAS Registry Number.

736140-69-5Relevant articles and documents

Sequential Wittig olefination-catalytic asymmetric epoxidation with reuse of waste Ph3P(O): Application of α,β-unsaturated N-Acyl pyrroles as ester surrogates

Kinoshita, Tomofumi,Okada, Shigemitsu,Park, Sun-Ryung,Matsunaga, Shigeki,Shibasaki, Masakatsu

, p. 4680 - 4684 (2003)

Waste not, want not: Efficient one-pot access to optically active epoxides with 96 to 99.5% ee from a variety of aldehydes is described. In a sequential process, the Ph3P(O) by-product of a Wittig reaction acts as a modulator for the samarium catalyst in the asymmetric epoxidation of the conjugated N-acyl pyrrole Wittig product (see scheme). The N-acyl pyrrole functionality is key to the high reactivity and selectivity observed. R = alkyl, aryl, vinyl.

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