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1443307-91-2

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1443307-91-2 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1443307-91-2 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,4,4,3,3,0 and 7 respectively; the second part has 2 digits, 9 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 1443307-91:
(9*1)+(8*4)+(7*4)+(6*3)+(5*3)+(4*0)+(3*7)+(2*9)+(1*1)=142
142 % 10 = 2
So 1443307-91-2 is a valid CAS Registry Number.

1443307-91-2Downstream Products

1443307-91-2Relevant articles and documents

Peptides and peptidoaldehydes as substrates for the Pictet-Spengler reaction

Pulka, Karolina,Slupska, Marta,Puszko, Anna,Misiak, Maria,Wilczek, Marcin,Kozminski, Wiktor,Misicka, Aleksandra

, p. 433 - 440 (2013/07/27)

The Pictet-Spengler (PS) reaction was performed with various types of substrates: H-Trp-OMe and dipeptides with N-terminal Trp as arylethylamine components and Z-protected amino aldehydes and peptidoaldehydes as carbonyl components. We found that the C-terminal part of Trp derivatives did not have any influence on the stereoselectivity of the reaction and the results are the same for simple esters of Trp and dipeptides. On the contrary, the selectivity of the PS reaction with peptidoaldehydes with L configuration of the C-terminus residue is totally different from that obtained with simple L-amino aldehydes. It allows us to obtain cis stereoisomers, which cannot be isolated from the reaction with amino aldehydes. But the utility of the peptidoaldehydes as substrates for the PS reaction is reduced by the side formation of enamides which decrease the yield of cyclization.

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