A Convenient Oxidative Dethioacetalization of 1,3-Dithiolanes and 1,3-Dithianes with Iron(III) Nitrate and Montmorillonite K10 in Hexane

Protection for the Carbonyl Group

“…For (n ϭ 2,3): N-Chlorobenzotriazole, CH 2 Cl 2 , Ϫ80ЊC; NaOH, 50% yield. When the reaction was run in MeOH, a dimethyl ketal was produced that could be hydrolyzed with AcOH 3 and Montmorillonite K10 clay in hexane 148 and Fe(NO 3 ) 3 /basic alumina are also effective. 20.…”

Fe3+-Montmorillonite K10 as an Efficient, Green and Reusable Heterogeneous Catalyst for Synthesis of Mannich Type Reaction under Solvent-free Condition

“…The Mannich bases exhibit anticonvulsant [9,10], antitubercular [11], antimalarial [12], anti-HIV [13], anti-viral [14], and anti-cancer [15] activities.…”

Five‐Membered Heterocycles with Two Heteroatoms: O and S Derivatives

“…SOCl 2 -treated silica and DMSO is a good combination with which to cleave 2-substituted-1,3-dithiolanes; however, under similar conditions 2,2-disubstituted-1,3-dithiolanes undergo ring expansion to give dihydro-1,4-dithiins [212]. Recent methods for the cleavage of 1,3-dithiolanes include the use of 2,4,6-trichlorotriazine and DMSO [213], oxone on wet alumina [214] and ferric nitrate on K-10 montmorillonite clay [215].…”