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Propanedioic acid, 2,2-di-2-propyn-1-yl-, also known as 2,2-bis(2-propynyl)malonic acid, is an organic compound with the chemical formula C9H10O4. It is a dicarboxylic acid with two propargyl groups (2-propyn-1-yl) attached to the central carbon atoms of the malonic acid backbone. This unique structure endows it with interesting chemical properties and potential applications in various fields, such as pharmaceuticals, materials science, and organic synthesis. The compound can be synthesized through various methods, including the reaction of malonic acid with propargyl bromide or the condensation of 2-propyn-1-ol with phosgene. Due to its reactive functional groups, it can undergo a range of chemical transformations, making it a valuable building block for the synthesis of more complex molecules.

4431-32-7

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4431-32-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 4431-32-7 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 4,4,3 and 1 respectively; the second part has 2 digits, 3 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 4431-32:
(6*4)+(5*4)+(4*3)+(3*1)+(2*3)+(1*2)=67
67 % 10 = 7
So 4431-32-7 is a valid CAS Registry Number.

4431-32-7Relevant academic research and scientific papers

Intramolecular Reactions of N-Nitrenes with Alkynes: Conformational Anchoring in Spiro-fused 2H-Azirines

Atkinson, Robert S.,Grimshire, Michael J.

, p. 1215 - 1224 (2007/10/02)

Oxidations of N-aminoquinazolin-4(3H)-ones (7)-(11) with lead tetra-acetate in dichloromethane results in the intramolecular addition of the N-nitrene to the triple bond in each case and azirines (20), (22), (17), (23), and (30), respectively, are isolated with (31) identified as a by-product in the oxidation of compound (11).An X-ray crystal structure determination on compound (17) reveals a remarkable deformation of bond angles at the spiro centre and this feature appears to be common to all azirines.The five membered ring in the azirines (17), (20), (22), and (23) has the envelope conformation (26) and the six-membered ring in the azirine (30) has the twist-boat conformation (32): a possible explanation for this conformational anchoring is offered.

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