Alkyne via Solid‐Liquid Phase‐Transfer Catalyzed Dehydrohalogenation: Acetylene Dicarboxaldehyde Tetramethyl Acetal and Acetylene Dicarboxaldehyde Dimethyl Acetal

Abstract 2,5‐Dimethoxy‐2,5‐dihydrofuran Bromine Dibromo‐2,5‐dimethoxytetrahydrofuran Methanol 2,3‐Dibromo‐1,1,4,4,‐tetramethoxybutane Tris[2‐(2‐methoxyethoxy)‐ethyl]amine Potassium hydroxide 1,1,4,4‐Tetramethoxybut‐2‐yne formic acid 4,4‐Dimethoxybut‐2‐ynal