Synthesis of acetals and ketals catalyzed by phosphotungstic acid supported on activated carbon was written by Yang, Shui-jin;Du, Xin-xian;Lu, Bao-lan. And the article was included in Beijing Huagong Daxue Xuebao, Ziran Kexueban in 2005.SDS of cas: 126-39-6 This article mentions the following:
Catalytic activities of the active carbon supported with phosphotungstic acid were reported for synthesizing 2-methyl-2-ethoxycarbonylmethyl-1,3-dioxolane, 2,4-dimethyl-2-ethoxycarbonylmethyl-1,3-dioxolane, cyclohexanone ethylene ketal, cyclohexanone 1,2-propanediol ketal, butanone ethylene ketal, butanone 1,2-propanediol ketal, 2-phenyl-1,3-dioxolane, 4-methyl-2-phenyl-1,3-dioxolane, 2-propyl-1,3-dioxolane,, and 4-methyl-2-propyl-1,3-dioxolane. It is demonstrated that the active carbon supported with phosphotungstic acid is an excellent catalyst. Various factors concerned in these reactions were investigated. The optimum conditions are found, i.e., the molar ratio of aldehyde/ketone to glycol 1/1.5, the mass percent of the catalyst used to the reactants 1.0%, and the reaction time 1 h. Under these conditions, the yield of 2-methyl-2-ethoxycarbonylmethyl-1,3-dioxolane is 76.4%, and 2,4-dimethyl-2-ethoxycarbonylmethyl-1,3-dioxolane 75.8%, the yield of cyclohexanone ethylene ketal 70.8%, and cyclohexanone 1,2-propanediol ketal 83.3%, the yield of butanone ethylene ketal 60.0%, and butanone 1,2-propanediol ketal 84.6%, the yield of 2-phenyl-1,3-dioxolane 83.0%, and 4-methyl-2-phenyl-1,3-dioxolane 81.3%, the yield of 2-propyl-1,3-dioxolane 91.4%, and 4-methyl-2-propyl-1,3-dioxolane 95.4%. In the experiment, the researchers used many compounds, for example, 2-Ethyl-2-methyl-1,3-dioxolane (cas: 126-39-6SDS of cas: 126-39-6).
2-Ethyl-2-methyl-1,3-dioxolane (cas: 126-39-6) belongs to dioxole derivatives. Dioxoles, particularly fluorinated dioxoles, are used as co-monomers to make polymers that find use in forming protective coatings for chemical resistance. Although benzodioxole is not particularly important, many related compounds containing the methylenedioxyphenyl group are bioactive, and thus are found in pesticides and pharmaceuticals.SDS of cas: 126-39-6
Referemce:
1,3-Benzodioxole – Wikipedia,
Dioxole | C3H4O2 – PubChem