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403519-45-9

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403519-45-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 403519-45-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 4,0,3,5,1 and 9 respectively; the second part has 2 digits, 4 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 403519-45:
(8*4)+(7*0)+(6*3)+(5*5)+(4*1)+(3*9)+(2*4)+(1*5)=119
119 % 10 = 9
So 403519-45-9 is a valid CAS Registry Number.

403519-45-9Relevant articles and documents

Construction of vicinal quaternary carbon atoms by Ireland ester Claisen rearrangement: Total synthesis of (±)-herbertenolide, (±)-herberteneacetal, (±)-herbertene-1,14-diol and (±)-herbertene-1,15-diol

Srikrishna,Vasantha Lakshmi

, p. 4879 - 4881 (2005)

Efficient total syntheses of the herbertane sesquiterpene title compounds have been accomplished employing an Ireland ester Claisen rearrangement and ring-closing metathesis reaction sequence based strategy for the construction of two stereogenic vicinal quaternary carbon atoms on a cyclopentane.

A simple, ring-closing metathesis reaction based approach to (±)-1,14-herbertenediol and (±)-11-epi-herbertenolide

Srikrishna,Rao, M.Srinivasa

, p. 151 - 154 (2007/10/03)

A total synthesis of 1,14-herbertenediol via 11-epi-herbertenolide, and a formal total synthesis of tochuinyl acetate and dihydrotochuinyl acetate, employing a ring-closing metathesis reaction based methodology, are described.

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