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20760-12-7

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20760-12-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 20760-12-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,0,7,6 and 0 respectively; the second part has 2 digits, 1 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 20760-12:
(7*2)+(6*0)+(5*7)+(4*6)+(3*0)+(2*1)+(1*2)=77
77 % 10 = 7
So 20760-12-7 is a valid CAS Registry Number.

20760-12-7Relevant articles and documents

Transfer Hydrogenation of Flavanones and ortho-Hydroxychalcones to 1,3-Diarylpropanols Catalyzed by CNN Pincer Ruthenium Complexes

Soto, Martín,Gotor-Fernández, Vicente,Rodríguez-Solla, Humberto,Baratta, Walter

, p. 2152 - 2157 (2021/03/03)

The transfer hydrogenation of flavanones and ortho-hydroxychalcones catalyzed by ruthenium pincer complexes RuCl(CNNPh)(disphosphine) has allowed the synthesis of ortho-hydroxy 1,3-diarypropanols in 80–88 % yield, under mild reaction conditions and short reaction times (1 h) in 2-propanol. The amount of the co-catalyst NaOiPr has been found crucial for the selective reduction of flavanones to ortho-hydroxy 1,3-diarypropanols vs. flavan-4-ols. Preliminary results show that with pincer catalysts bearing (S,R)-Josiphos, flavanone is reduced to the corresponding (S)-alcohol in moderate conversion (36 %) and up to 92 % ee.

Zirconium-catalyzed Nagata reaction for the synthesis of 2-aryl-1,3,2-aryldioxaborins via a mild three-component condensation of phenols, aldehydes, and boronic acid

Zheng, Hongchao,Hall, Dennis G.

supporting information; experimental part, p. 4256 - 4259 (2010/09/07)

An efficient ZrCl4-catalyzed ortho-hydroxyalkylation of phenols with aldehydes promoted by 3,5-bis(trifluoromethyl)phenyl boronic acid, leading to the formation of 2-aryl-1,3,2-aryldioxaborins, was investigated and optimized. The reaction afforded the desired aryldioxaborins in good to excellent yields under mild conditions at room temperature. The electron-deficient boronic acid promoter was essential. Electron-rich phenols react faster, and both alkyl and aryl aldehydes are suitable substrates. The resulting aryldioxaborins can be further elaborated to produce substituted saligenols, 2-ethoxy chromans, and 2-substituted phenols.

Structural requirements for activity of propafenone-type modulators in P- glycoprotein-mediated multidrug resistance

Chiba,Ecker,Schmid,Drach,Tell,Goldenberg,Gekeler

, p. 1122 - 1130 (2007/10/03)

The sodium channel blocker propafenone and a series of analogs have been identified as effective modulators of P-glyco-protein-mediated multidrug resistance in human tumor cells. A series of closely related structural homologues showed a highly significant correlation between lipophilicity and pharmacological effect. Reduction of the carbonyl group as well as conversion to a methylether led to a remarkable decrease in activity, whereby lipophilicity lost its predictive character as the main determinant for modulator potency. Similarly, the relative positioning of the acyl- and propanolamine side chains also influences activity, so the distance between carbonyl group and nitrogen atom seems important.

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