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887142-47-4

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887142-47-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 887142-47-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 8,8,7,1,4 and 2 respectively; the second part has 2 digits, 4 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 887142-47:
(8*8)+(7*8)+(6*7)+(5*1)+(4*4)+(3*2)+(2*4)+(1*7)=204
204 % 10 = 4
So 887142-47-4 is a valid CAS Registry Number.

887142-47-4Relevant articles and documents

Indole diterpene synthetic studies. Total synthesis of (+)-nodulisporic acid F and construction of the heptacyclic cores of (+)-nodulisporic acids A and B and (-)-nodulisporic acid D

Smith III, Amos B.,Davulcu, Akin H.,Young, Shin Cho,Ohmoto, Kazuyuki,Kuerti, Laszlo,Ishiyama, Haruaki

, p. 4596 - 4610 (2008/02/05)

(Chemical Equation Presented) A first-generation strategy for construction of (+)-nodulisporic acids A (1) and B (2) is described. The strategy entails union of the eastern and western hemisphere subtargets via the indole synthesis protocol developed in our laboratory. Subsequent elaboration of rings E and F, however, revealed the considerable acid instability of the C(24) hydroxyl, thereby preventing further advancement. Nonetheless, preparation of the heptacyclic core of (+)-nodulisporic acids A and B, the total synthesis of (+)-nodulisporic acid F, the simplest member of the nodulisporic acid family, and elaboration of the heptacyclic core of (-)-nodulisporic acid D were achieved.

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