SYNTHESIS AND CONFORMATION OF 2-SILYLETHYNYL-SUBSTITUTED 2,4,4,6-TETRAMETHYL-1,3-DIOXANES

Reaction of 2,4,4,6-tetramethyl-1,3-dioxanium perchlorate with lotsich reagents led to the synthesis of new silylethynyl-substituted 2,4,4,6-tetramethyl-1,3-dioxanes. According to the data of1H and13C NMR and x-ray diffraction analysis, it was established that the 1,3-dioxane ring of the products obtained has the chair conformation.