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1252671-72-9

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1252671-72-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1252671-72-9 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,2,5,2,6,7 and 1 respectively; the second part has 2 digits, 7 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 1252671-72:
(9*1)+(8*2)+(7*5)+(6*2)+(5*6)+(4*7)+(3*1)+(2*7)+(1*2)=149
149 % 10 = 9
So 1252671-72-9 is a valid CAS Registry Number.

1252671-72-9Relevant articles and documents

Ethynyl-1,2-benziodoxol-3(1H)-one (EBX): An exceptional reagent for the ethynylation of keto, cyano, and nitro esters

Gonzalez, Davinia Fernandez,Brand, Jonathan P.,Waser, Jerome

supporting information; experimental part, p. 9457 - 9461 (2010/10/03)

Hot alkyne! The in situ generation of ethynyl-1,2-benziodoxol-3(1H)-one (EBX) from a silyl-protected reagent by using TBAF is reported. EBX displayed exceptional acetylene transfer ability onto stabilized enolates (see scheme), even at -78 □°C. The mild reaction conditions allowed the first ethynylation reactions of linear keto, cyano, and nitro esters in high yields to give all-carbon quaternary centers or non-natural amino acids after selective reduction of the nitro group.

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