Rcf. Jones et al., CONDENSATION-REACTIONS OF 4,5-DIHYDROIMIDAZOLES - PREPARATION AND CONJUGATE ADDITIONS OF 2-ALKENYL-4,5-DIHYDROIMIDAZOLES, Tetrahedron, 53(3), 1997, pp. 1111-1122
Whereas 1-benzyl-2-lithiomethyl-4,5-dihydroimidazole undergoes reversi
ble 1,2-addition to aldehydes and ketones, the derived phosphonate sal
t, 1-benzyl-2-lithio(diethylphosphono)methyl-4,5- dihydroimidazole, af
fords the condensation products. 2-(1-alkenyl)-4,5-dihydroimidazoles;
these latter undergo conjugate addition with carbon nucleophiles. Copy
right (C) 1996 Elsevier Science Ltd