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880344-77-4

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880344-77-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 880344-77-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 8,8,0,3,4 and 4 respectively; the second part has 2 digits, 7 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 880344-77:
(8*8)+(7*8)+(6*0)+(5*3)+(4*4)+(3*4)+(2*7)+(1*7)=184
184 % 10 = 4
So 880344-77-4 is a valid CAS Registry Number.

880344-77-4Relevant articles and documents

Total synthesis of the proposed azaspiracid-1 structure, Part 1: Construction of the enantiomerically pure C1-C20, C21-C27, and C28-C40 fragments

Nicolaou,Li, Yiwei,Uesaka, Noriaki,Koftis, Theocharis V.,Vyskocil, Stepan,Ling, Taotao,Govindasamy, Mugesh,Qian, Wenyuan,Bernal, Federico,Chen, David Y.-K.

, p. 3643 - 3648 (2003)

As a build-up to the synthesis of the proposed structure of azaspiracid, both enantiomers of fragments 2, 3, and 4 were synthesized stereoselectively. Piv=pivaloyl, PFP = pentafluorophenyl, Teoc = 2-(trimethylsilyl)ethoxycarbonyl, TES = triethylsilyl.

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