Triethylamine → HCID 18980001, compound

Participants

Reaction Steps

A solution of tris(dibenzylideneacetone)dipalladium (O) (0.051 g) in toluene (31 mL) was treated with triphenylphosphine (0.058 g). The solution was stirred under argon at room temperature for 15 minutes and then it was treated with 8-chloro-4-iodo-3-methoxy-2,5-dioxo-2,5-dihydro-1H-benz[b]-azepine (0.97 g) followed by ethyl acrylate (4.3 mL, 4.0 g). The mixture was then treated with triethylamine (0.37 mL, 0.27 g). The mixture was heated to 104° C. for 1.5 hours and then it was cooled to room temperature. Another portion of tris(dibenzylideneacetone)dipalladium (O) (0.025 g) and more triphenyl phosphine (0.029 g) was added to the mixture. The mixture was then treated with more ethyl acrylate (2.8 mL) and it was heated to 105° C. for 1 hour and then it was cooled to room temperature and concentrated to a brown glass. It was dissolved in chloroform and chromatographed on a silica gel column (5.5 cm diameter×20 cm long) using 25% ethyl acetate in hexane to give a pale yellow solid (0.115 g). The solid was recrystallized from ethyl acetate (10 mL) at room temperature to give an off-white solid (0.0712 g); mp 233.8°-234.5° C.; 1H NMR (CDCl3) 7.73 (d, 1, J=16), 6.69 (d, 1, J=16) for trans olefin protons; MS: m/z=336 (M+1). Analysis for C16H14ClNO5 : Calculated: C, 57.24; H, 4.20; N, 4.17; Found C, 57.09; H, 4.16; N, 4.09.

Provenance & Evidence