Diazo transfer reaction of 2-(trimethylsilyl)-1,3-dithiane with tosyl azide, carbenic reactivity of transient 2-diazo-1,3-dithiane

Article abstract of DOI:10.1016/S0040-4020(97)00538-3

A novel diazo transfer reaction of 2-lithiated 2-(trimethylsilyl)1,3-dithiane with tosyl azide in a 1:20 HMPA-THF mixture furnishes 2-diazo-1,3-dithiane 2, which decomposes at about 0°C to;give in fairly high yield bis(1,3-dithianylidene) 5 through formal