4-chlorophthalazin-1(2H)-one → 4-(4-chlorobenzyl)phthalazin-1(2H)-one

Participants

Reaction Steps

A solution of (4-chlorobenzyl)zinc(II) chloride in THF was added to a suspension of 4-chlorophthalazin-1(2H)-one and Pd(PPh3)4 in THF, and subjected to microwave conditions at 180° C. for 20 minutes. The mixture was diluted with EtOAc, washed with saturated aqueous NaHCO3 and brine, dried (Na2SO4), filtered, and concentrated to give crude 4-(4-chlorobenzyl)phthalazin-1(2H)-one. This material was treated with O-(diphenylphosphoryl)hydroxylamine similar to that described in Example 1B to give the title compound. LC/MS (APCI) M/Z 286 (M+H)+.

Provenance & Evidence