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Diphenylethylmethylphosphonium iodide is a phosphonium salt with the chemical formula C19H20IP. It is a colorless crystalline solid that is soluble in water and organic solvents. diphenylethylmethylphosphonium iodide is primarily used as a phase-transfer catalyst in organic synthesis, facilitating the transfer of reactants between aqueous and organic phases. It is also employed in the preparation of various organophosphorus compounds and as a reagent in the synthesis of pharmaceuticals and agrochemicals. Due to its ability to stabilize metal complexes, diphenylethylmethylphosphonium iodide finds applications in catalysis and materials science.

1661-08-1

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1661-08-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1661-08-1 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 1,6,6 and 1 respectively; the second part has 2 digits, 0 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 1661-08:
(6*1)+(5*6)+(4*6)+(3*1)+(2*0)+(1*8)=71
71 % 10 = 1
So 1661-08-1 is a valid CAS Registry Number.

1661-08-1Relevant academic research and scientific papers

Reactivity of phosphonium diylids with esters and amides

Cristau, Henri-Jean,Ribeill, Yves

, p. C51 - C53 (1988)

The phosphonium diylid (C6H5)2P(CH2)(CH2Li) reacts readily with various esters and amides to give acylated phosphonium salts and Wittig products.In the case of N,N-dimethylbenzamide the reaction can be directed mainly to the Wittig products by protonation.Depending on the nature of the carbonyl group, unexpected reactions, such as conjugate additions to α,β-unsaturated compounds or enolization of α-hydrogenated amides, can also take place.

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