Nickel-catalyzed tandem reactions of 3-(2-hydroxy-phenyl)-acrylic acids 1 and 2-iodo-benzenethiols 2, each involving cyclic esterification/C–S bond formation^a.

Entry	R	R1	3	Yieldb
1	H	H		83
2	5-CH3	H		84
3	5-CH3	Naphthyl		86
4	4-CH3O	H		89
5	4-CH3O	4,5-diCH3O		76
6	4-CH3O	Naphthyl		81
7	5-F	H		71
8	5-Cl	H		75
9	5-Br	H		69
10	4,5-diCH3	H		74
11	4,5-diCH3O	Naphthyl		72

^aUnless otherwise noted, reaction conditions were 1 (0.5 mmol), 2 (0.6 mmol), Ni(CO)₄ (10 mol%), NaOEt (2 equiv.), DMSO (5 mL), 90 °C and a reaction time of 10 h.

^bIsolated yield.