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53165-40-5

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53165-40-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 53165-40-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 5,3,1,6 and 5 respectively; the second part has 2 digits, 4 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 53165-40:
(7*5)+(6*3)+(5*1)+(4*6)+(3*5)+(2*4)+(1*0)=105
105 % 10 = 5
So 53165-40-5 is a valid CAS Registry Number.

53165-40-5Relevant articles and documents

Stereoselective synthesis of racemic and optically active E-vinyl and E- dienyl sulfoxides via Wittig reaction of α-sulfinyl phosphonium ylides

Mikolajczyk, Marian,Perlikowska, Wieslawa,Omelanczuk, Jan,Cristau, Henri-Jean,Perraud-Darcy, Anne

, p. 9716 - 9722 (1998)

A series of α-sulfinyl phosphonium ylides have been obtained in the reaction of phosphonium mono- and diylides with sulfinic acid esters. The use of (-)-(S)-menthyl p-toluenesulfinate in this reaction afforded the corresponding (S)-((p-tolylsulfinyl)methyl)triphenylphosphonium ylide. The Wittig reaction of these ylides with saturated and unsaturated aldehydes resulted in the formation of racemic and optically active (+)-(R)-vinyl and dienyl sulfoxides with the E-geometry. The synthesis of (+)-(R)-((p- tolylsulfinyl)methyl)triphenylphosphonium iodide as a precursor of the optically active ylide has also been described.

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