Tetrahedron Letters,Vol.30,No.8,pp 899-902,1989 0040-4039/89 $3.00 + .OO ... 901 2: Doering, W. von B.; Odum, RA Tetrahedron (1966) 22, 81 ... (d) 0.04 M azide and 1.DM diethylamine (DEA) in 2-MTHF (e) 0.04 M azide, 1.0 M diethylamine and 10% isoprene (IP) (by volume) in 2 ...