<i>N-</i>Morpholinomethyl-5-lithiotetrazole: A Reagent for the One-Pot Synthesis of 5-(1-Hydroxyalkyl)tetrazoles
作者:Panagiotis D. Alexakos、Duncan J. Wardrop
DOI:10.1021/acs.joc.9b01885
日期:2019.10.4
An efficient, one-pot method for the preparation of 5-(1-hydroxyalkyl)tetrazoles is reported. N-Morpholinomethyl-5-lithiotetrazole, generated by the deprotonation of 4-(N-tetrazolylmethyl)morpholine with LiHMDS, undergoes addition to ketones and aldehydes (both aromatic and aliphatic) to form 5-(1-hydroxyalkyl)tetrazoles in a high yield, after acidic workup. The reported protocol displays a broad substrate
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