Propyne → HCID 67286863, compound

Participants

Reaction Conditions

Reaction Steps

A mixture of the product of Step A (0.123 g; 0.296 mmol), Cl2Pd(PPh3)2 (0.040 g; 0.057 mmol), CuI (0.014 g; 0.073 mmol) in anhydrous triethylamine (3 ml) was cooled to −40° C., degassed under reduced pressure and saturated with dry N2. The propyne gas (0.45 g; 11.2 mmol) was added to it at −40° C. The reaction flask was sealed with septum and allowed to warm up to room temperature and stirred for 3 h at room temperature and diluted to 20 ml with diethyl ether and solid precipitated, filtered off. The filtrate was evaporated to dryness under reduced pressure and the residue, purified by flash column chromatography (SiO2, hexane, hexane/ethyl acetate, 9:1) to give the title compound (0.065 g; 67% yield) as colourless syrup. 1H-NMR (CDCl3) 1.26 (d, 6H, J=6.17 Hz); 2.09 (s, 3H); 3.79 (s, 3H); 4.2 (s, 2H); 4.44 (m, 1H, J=6.17 Hz); 6.73 (d, 1H, J=8.53 Hz); 7.12 (d, 1H, J=8.53 Hz); 7.15-7.4 (m, 5H).

Provenance & Evidence