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131581-04-9

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131581-04-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 131581-04-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,1,5,8 and 1 respectively; the second part has 2 digits, 0 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 131581-04:
(8*1)+(7*3)+(6*1)+(5*5)+(4*8)+(3*1)+(2*0)+(1*4)=99
99 % 10 = 9
So 131581-04-9 is a valid CAS Registry Number.

131581-04-9Downstream Products

131581-04-9Relevant articles and documents

Assembly of Terpenoid Cores by a Simple, Tunable Strategy

Lahtigui, Ouidad,Emmetiere, Fabien,Zhang, Wei,Jirmo, Liban,Toledo-Roy, Samira,Hershberger, John C.,Macho, Jocelyn M.,Grenning, Alexander J.

, p. 15792 - 15796 (2016)

Oxygenated, polycyclic terpenoid natural products have important biological activities. Although total synthesis of such terpenes is widely studied, synthetic strategies that allow for controlled placement of oxygen atoms and other functionality remains a challenge. Herein, we present a simple, scalable, and tunable synthetic strategy to assemble terpenoid-like polycycloalkanes from cycloalkanones, malononitrile, and allylic electrophiles, abundantly available reagent classes.

Synthetic Studies on Wedeligenin: Preparation of 3-Hydroxy-Substituted Decalincarbonitriles as a Model for 'A Ring' Annulation

MacLeod, John K.,Molinski, Tadeusz F.

, p. 1309 - 1326 (2007/10/02)

Six new 3-hydroxydecalincarbonitriles were synthesized by employing an annulation strategy involving intramolecular alkylation of 5-bromoalkyl substituted malononitriles or acetonitriles. 2-Allyl-2-methylcyclohexanone was condensed with malononitrile to g

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