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1606178-91-9

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1606178-91-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1606178-91-9 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,6,0,6,1,7 and 8 respectively; the second part has 2 digits, 9 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 1606178-91:
(9*1)+(8*6)+(7*0)+(6*6)+(5*1)+(4*7)+(3*8)+(2*9)+(1*1)=169
169 % 10 = 9
So 1606178-91-9 is a valid CAS Registry Number.

1606178-91-9Upstream product

1606178-91-9Relevant academic research and scientific papers

One-pot synthesis of ureas from Boc-protected amines

Spyropoulos, Constantinos,Kokotos, Christoforos G.

, p. 4477 - 4483 (2014)

A practical one-pot synthesis of ureas is described. Boc-protected amines can be transformed into nonsymmetrical and symmetrical disubstituted and trisubstituted ureas utilizing 2-chloropyridine and trifluoromethanesulfonyl anhydride for the in situ generation of an isocyanate, which reacts with an amine. A variety of amines can be employed successfully, leading to high yields of isolated ureas.

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