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80457-65-4

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80457-65-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 80457-65-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,0,4,5 and 7 respectively; the second part has 2 digits, 6 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 80457-65:
(7*8)+(6*0)+(5*4)+(4*5)+(3*7)+(2*6)+(1*5)=134
134 % 10 = 4
So 80457-65-4 is a valid CAS Registry Number.

80457-65-4Relevant articles and documents

Drugs derived from Cannabinoids. Part 8. The Synthesis of Side-chain Analogues of Δ6a,10a-Tetrahydrocannabinol

Meltzer, Peter C.,Dalzell, Haldean C.,Razdan, Raj K.

, p. 2825 - 2829 (1981)

The continuation of studies on the synthesis of side-chain analogues of Δ6a,10a-tetrahydrocannabinol as potential therapeutic agents has led to the syntheses of a possible metabolite 1-hydroxy-6,6,9-trimethyl-7,8,9,10-tetrahydro-6H-dibenzopyran-3-ylacetic acid (1) and 2-(1-hydroxy-6,6,9-trimethyl-7,8,9,10-tetrahydro-6H-dibenzopyran-3-yl)pent-4-ynoic acid (17c).The Pechmann condensation of ethyl 4-methyl-2-oxocyclohexane-1-carboxylate with methyl 3,5-dihydroxyphenylacetate (11), followed by Grignard reaction, was utilized to produce the pyran (1).The key step in the synthesis of the propargylacetic acid (17c) was propargylation of the malonate (15) under phase-transfer catalysis.

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