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2-Ethoxy-4-methyl-1,3,2-dioxaphospholane 2-oxide is a phosphorus-containing organic compound with the chemical formula C5H11O4P. It is a cyclic ether derivative, featuring a phosphorus atom bonded to two oxygen atoms and a five-membered ring structure. 2-ethoxy-4-methyl-1,3,2-dioxaphospholane 2-oxide is known for its reactivity and is often used as a reagent in organic synthesis, particularly in the formation of various phosphorus-containing compounds. It is also recognized for its potential applications in the synthesis of pharmaceuticals and agrochemicals due to its ability to form stable intermediates. The compound's structure and properties make it a valuable tool in the field of chemistry, although it requires careful handling due to its reactivity.

697-36-9

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697-36-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 697-36-9 includes 6 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 3 digits, 6,9 and 7 respectively; the second part has 2 digits, 3 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 697-36:
(5*6)+(4*9)+(3*7)+(2*3)+(1*6)=99
99 % 10 = 9
So 697-36-9 is a valid CAS Registry Number.

697-36-9Downstream Products

697-36-9Relevant academic research and scientific papers

Reaction of Epoxides with Metaphosphoric Acid Derivatives

Bodalski, Ryszard,Quin, Louis D.

, p. 2666 - 2671 (1991)

Ethyl metaphosphate (EtOPO2), eliminated in the thermolysis of the bridged cyclic phosphonate endo-3-ethoxy-6-methyl-N-phenyl-2,3-oxabicyclooct-5-ene-8,9-dicarboximide 3-oxide, has been found to cause ring opening of epoxides, resulting in formation of 2-ethoxy-4-substituted 1,3,2-dioxaphospholane 2-oxides as major products.N,N-Diethyl metaphosphoramidate (Et2NPO2) reacted similarly.With ethyl metathiophosphate (EtOP(S)O), the 1,3,2-oxathiaphospholane 2-oxide ring was formed.Products of these reactions were characterized by 31P NMR spectroscopy and by GC-MS.These reactions are presumed to be initiated by electrophilic attack of the metaphosphate on the epoxide oxygen to form a cyclic oxonium ion.

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