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70197-44-3

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70197-44-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 70197-44-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,0,1,9 and 7 respectively; the second part has 2 digits, 4 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 70197-44:
(7*7)+(6*0)+(5*1)+(4*9)+(3*7)+(2*4)+(1*4)=123
123 % 10 = 3
So 70197-44-3 is a valid CAS Registry Number.

70197-44-3Downstream Products

70197-44-3Relevant articles and documents

Z-Stereoselective Aza-Peterson Olefinations with Bis(trimethylsilane) Reagents and Sulfinyl Imines

Das, Manas,OShea, Donal F.

, p. 336 - 339 (2016)

Highly stereoselective aza-Peterson olefinations from bench-stable α,α-bis(trimethylsilyl)toluene reagents and N-substituted imines have been achieved using TMSO-/Bu4N+ as Lewis base activator in THF. Remarkably, and for the first time, N-t-butanesulfinyl imines were utilized for the synthesis of Z-stilbenes with excellent selectivities, while N-aryl imines generated E-stilbenes under identical reaction conditions. The protocol proved general for numerous examples with low molecular weight byproducts formed. The origin of the Z-selectivity is proposed to be a result of diastereoselective addition to N-t-butanesulfinyl imines followed by syn-elimination of an in situ formed hypervalent silicate.

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