1,4-Dioxaspiro[4.5]decan-8-one → N-(1,4-dioxaspiro[4.5]dec-8-ylidene)-2-methylpropane-2-sulfinamide

Participants

Reaction Steps

To a solution of 1,4-dioxa-spiro[4.5]decan-8-one (Aldrich, 4.07 g, 26.1 mmol) and 2-methyl-propane-2-sulfinic acid amide (Aldrich, 3.16 g, 26.1 mmol) in THF (20 mL) was added Ti(OEt)4 (Aldrich, 10.8 mL, 52.2 mmol) at room temperature. The reaction was stirred overnight and quenched with ˜5 mL water until precipitation completed. The solid was filtered off and washed with additional ethyl acetate. The combined filtrate was dried over anhydrous Na2SO4, filtered, concentrated and the residue was purified by a CombiFlash® system using hexanes and ethyl acetate as eluent (from pure hexanes to pure ethyl acetate) to afford the title compound as colorless oil.

Provenance & Evidence