Dehydrative Fragmentation of 5-Hydroxyalkyl-1<i>H</i>-tetrazoles: A Mild Route to Alkylidenecarbenes
作者:Duncan J. Wardrop、John P. Komenda
DOI:10.1021/ol300276p
日期:2012.3.16
The development of a mild, base-free method for the generation of alkylidenecarbenes is reported. Treatment of 5-hydroxyalkyl-1H-tetrazoles with carbodiimides generates products arising from the 1,2-rearrangement or [1,5]-C–H bond insertion of a putative alkylidenecarbene. Formation of this divalent intermediate is proposed to occur by way of a tetraazafulvene, which undergoes extrusion of 2 mol of