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118088-55-4

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118088-55-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 118088-55-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,1,8,0,8 and 8 respectively; the second part has 2 digits, 5 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 118088-55:
(8*1)+(7*1)+(6*8)+(5*0)+(4*8)+(3*8)+(2*5)+(1*5)=134
134 % 10 = 4
So 118088-55-4 is a valid CAS Registry Number.

118088-55-4Relevant articles and documents

The total synthesis of (±)-barbatusol

Majetich, George,Zhang, Yong,Lee Feltman,Duncan Jr., Sammy

, p. 445 - 448 (1993)

An eight-step synthesis of the naturally occurring hypotensive diterpene barbatusol (3) featuring a Friedel-Crafts annulation is reported.

Use of conjugated dienones in cyclialkylations: The total syntheses of (±)-barbatusol, (±)-pisiferin, (±)-deoxofaveline, (±)-xochitlolone, and (±)-faveline

Majetich, George,Hicks, Rodgers,Zhang, Yong,Tian, Xinrong,Feltman, Terry Lee,Fang, Jing,Duncan Jr., Sam

, p. 8169 - 8185 (2007/10/03)

Concise syntheses of five tricyclic diterpenoids are reported. The key reaction in each synthesis is a cyclialkylation of a functionalized arene with a Lewis acid-activated conjugated dienone to generate a 6,7,6-fused tricycle.

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