Sodium Carbonate → tert-butyl N-[4-[3-(4-hydroxy-2,6-dimethylphenyl)phenyl]sulfonyl-5-methylsulfanylthiophene-2-carboximidoyl]carbamate

Participants

Reaction Steps

Following the same procedure as in Example 1, step c, reaction of 3,5-dimethyl-4-(4,4,5,5-tetramethyl-[1,3,2]dioxaborolan-2-yl)-phenol (355 mg, 0.8 mmol, assuming quantitative yield from Example 224, step a), {[4-(3-bromo-benzenesulfonyl)-5-methylsulfanyl-thiophen-2-yl]-imino-methyl}-carbamic acid tert-butyl ester (100 mg, 0.2 mmol, as prepared in Example 27, step c), tetrakis(triphenylphosine)palladium(0) (58 mg, 0.05 mmol, Strem Chemicals Inc, Newburyport, Mass.), Na2CO3 (0.8 mL, 2M), and toluene/EtOH mixture (2:1, 2.4 mL) afforded 35 mg (13%) after purification (PTLC) of the title compound as a tan solid. ESI-MS (m/z): Calcd. for C25H28N2O5S3: 532.7; found: 532.8, 477.0, 433.1 (M−Boc).

Provenance & Evidence