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1312681-83-6

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1312681-83-6 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1312681-83-6 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,3,1,2,6,8 and 1 respectively; the second part has 2 digits, 8 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 1312681-83:
(9*1)+(8*3)+(7*1)+(6*2)+(5*6)+(4*8)+(3*1)+(2*8)+(1*3)=136
136 % 10 = 6
So 1312681-83-6 is a valid CAS Registry Number.

1312681-83-6Upstream product

1312681-83-6Downstream Products

1312681-83-6Relevant articles and documents

PyOxP and PyOxB: The Oxyma-based novel family of phosphonium salts

Subiros-Funosas, Ramon,El-Faham, Ayman,Albericio, Fernando

, p. 3665 - 3673 (2010)

Recent studies described the great impact of a non-benzotriazolic family of coupling reagents based on ethyl 2-cyano-2-(hydroxyimino)acetate, Oxyma, as a powerful coupling methodology for peptide synthesis. Here we present the synthesis and evaluation of the derived phosphonium salts O-[(1-cyano-2-ethoxy- 2-oxoethylidene)amino]-oxytri(pyrrolidin-1-yl) phosphonium hexafluorophosphate (PyOxP) and tetrafluoroborate (PyOxB). Both coupling reagents exhibited higher capacity to suppress racemization in various peptide models and enhanced solubility in DMF and DCM than benzotriazole-based reagents. In addition, the hexafluorophosphate analog PyOxP, combined excellent stability with outstanding efficiency in the assembly of demanding penta and decapeptides that include consecutive Aib residues. Cyclization models revealed the advantages of PyOxP, which rendered a higher percentage of cyclic material than other known potent phosphonium salts.

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