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1276688-49-3

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1276688-49-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1276688-49-3 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,2,7,6,6,8 and 8 respectively; the second part has 2 digits, 4 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 1276688-49:
(9*1)+(8*2)+(7*7)+(6*6)+(5*6)+(4*8)+(3*8)+(2*4)+(1*9)=213
213 % 10 = 3
So 1276688-49-3 is a valid CAS Registry Number.

1276688-49-3Downstream Products

1276688-49-3Relevant articles and documents

Total synthesis of cortistatins A and J

Yamashita, Shuji,Iso, Kentaro,Kitajima, Kazuki,Himuro, Masafumi,Hirama, Masahiro

, p. 2408 - 2425 (2011/06/20)

This paper describes the details of our synthetic studies on the marine steroidal alkaloids cortistatins A and J. The key features of our strategy include (i) an efficient Knoevenagel/electrocyclic strategy to couple the diketone and the CD-ring fragment, (ii) a chemoselective radical cyclization to construct the oxabicyclo[3.2.1]octene B-ring system, (iii) a highly stereocontrolled installation of the isoquinoline unit, and (iv) a late-stage functionalization of the A-ring.

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