Sodium hydride → HCID 178422610, compound

Participants

Reaction Conditions

Reaction Steps

To a stirred mixture of NaH (1.98 g, 0.049 mol, 60% oil dispersion) in dry THF (30 mL) was added a suspension of diethoxyphosphorylacetone tosyl hydrazone (8.97 g, 0.024 mol; N Almirante Syn. Lett. 1999, 302.) in a mixture of THF (35 mL) and DMF (5.0 mL) dropwise over 15 min. The yellow suspension was stirred at 0-5° C. for 30 min and was treated with a 4-biphenyl carboxaldehyde (3.10 g, 0.0169 mol) in dry THF (30 mL) at 0-5° C. over 15 min. The orange solution was heated and stirred at reflux for 4 h and stirred at ambient temperature overnight. The mixture was poured into 5% aq. NaH2PO4 (350 mL) and extracted with EtOAc (2×200 mL). The organic layers were combined, washed with brine, dried (MgSO4), filtered, and concentrated to a yellow semi-solid. This material was triturated with hot EtOAc (20 mL) and filtered. The solid was washed with EtOAc (2×10 mL) and dried under high vacuum to give the title compound (2.61 g, 47%): HRMS Calculated for C16H15N2: m/z 235.1235. Found: 235.1230.

Provenance & Evidence