1.1- diazido

Ethane-1,1-Diazido or 1,1-Diaxidaethane (1,1-DAzEt), solid, extremely unstable, even at RT. The first attempt to prep it in 1908 (Ref 2) failed because a disastrous expln occurred and its prepn was not repeated Refs 1) Beil — not found 2) M. Forster et al, JCS 93, 1073(1908)... 

Preparation of triethyl orthoacetate by the reaction of ethyl 1,1-diazido-ethyl ether with sodium ethoxide [207]. 

Michl, Nefedov and coworkers204 reported that UV irradiation of matrix-isolated 1,1-diazido-1 -germacyclopent-3-ene (the germanium analog of 13) produced l//-germole and... 

Diazido-l-ethoxy-propan [37% Sdp. 46-4779 Torr (1,2 kPa)], eine explosive Fliissigkeit, wird durch Addition von Stickstoffwasserstoffsaure an 1-Ethoxy-l-propin erhalten595 ... 

Cycloaddition of hydrazoic acid to aldononitriles (618) (71MI2 75MI5 79MI13 90MI3) or thermolysis of the 1,1-diazido acyclic sugar derivatives 789 [95JCS(P1)1747] yielded the tetrazole acyclo C-nucleosides 749 (Scheme 218). 

Photolysis of 2,3,4,6-tetra-O-acetyl-l-C-cyano-P-D-galactopyranosyl azide gave the oxazepine derivative 110 in 50% yield a similar product was obtained from the D-arabinopyranosyl analogue. Full details have been reported on the formation of various tetrazole derivatives by photolysis and thermolysis of 1,1-diazido-sugar derivatives (cf. Vol.27, p.l38 Vol.28, p.l54). Compound 111 was the unexpected product from reaction of 2,3,4,6-tetra-O-acetyl-D-glucopyranosyl-idene 1,1-diazide with triphenylphosphine. ... 

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