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20643-65-6

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20643-65-6 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 20643-65-6 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,0,6,4 and 3 respectively; the second part has 2 digits, 6 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 20643-65:
(7*2)+(6*0)+(5*6)+(4*4)+(3*3)+(2*6)+(1*5)=86
86 % 10 = 6
So 20643-65-6 is a valid CAS Registry Number.

20643-65-6Relevant articles and documents

Lewis acid-assisted dirhodium(II)-catalyzed ketone hydroacylation

Yasukawa, Tomohiro,Kobayashi, Shu

, p. 98 - 100 (2017)

The combination of a Rh(II) salt and a Lewisacid, Sc(OTf)3, as a highly active and robust cooperative catalyst system for ketone hydroacylation was developed. The catalyst system showed high turnover numbers (up to ca. 400) even under air, whereas the corresponding Rh(I)/Sc(OTf)3 system did not work well. The application of the Rh(II)/Sc system was also extended to hydroacylation of olefins and an enantioselective reaction.

Synthesis and characterization of benzannelated thienyl oligomers

Amaladass, Pitchamuthu,Clement, J. Arul,Mohanakrishnan, Arasambattu K.

experimental part, p. 3798 - 3810 (2009/04/07)

An array of 1,3-diarylbenzo[c]thiophenes have been synthesized by the ring-opening of lactones followed by thionation using Lawesson's reagent with concurrent intramolecular cyclization. Photophysical studies of the various benzo[c]thiophene analogues are presented. The results of a cyclic voltammetric investigation of the benzo[c]thiophenes are also reported.

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