Phosphorus, Sulfur, and Silicon and the Related Elements, ( ISI ), Volume (198), No (9), Year (2023-9) , Pages (752-764)

Title : ( Facile chemoselective dithioacetalization of carbonyl compounds promoted by Fe3O4@MCM-41-GPTMS-Gu-CuIINPs as an efficient magnetic nanostructured catalyst )

Authors: Hamid Mohammadzadeh Dovvom , Batool Akhlaghinia ,

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Abstract

Dithioacetalization, as a well-known class of organic transformation, was carried out for protection of a wide variety of aromatic (with electron releasing and electron withdrawing substituents), heteroaromatic and aliphatic aldehydes as well as ketones by 1,2-ethanedithiol/or 1,3-propanedithiol in the presence of Fe3O4@MCM-41-GPTMS-Gu-CuIINPs. The corresponding 1,3-dithiolanes and 1,3- dithianes were obtained chemoselectively in the presence of Fe3O4@MCM-41-GPTMS-Gu-CuIINPs with hexagonal core-shell structure, superparamagnetic behavior, and average particle size of 8– 25nm under mild reaction conditions. The nanostructured catalyst could be separated easily from the reaction mixture using a magnetic bar and reused in several reaction runs without any remarkable reduction in its catalytic activity. Nearly neutral conditions, good to high yields of the products, operational simplicity, easy work-up procedure, compatibility with various functional groups make the present method valuable in addition to the known methodologies.

Keywords

, Fe3O4@MCM, 41, GPTMS, Gu, CuIINPs; carbonyl compounds; dithiolanes; dithianes; dithioacetalization; nanostructured catalyst 1. Introduction