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Table 2 Scope of the reaction
figurec

From: Synthesis of (1E,3E)-1,4-diarylbuta-1,3-dienes promoted by μ-OMs palladium–dimer complex

Entrya R1 R2 Product t/h Yield/%b
1 H 4-Cl 3b 18 82
2 H 3-Cl 3c 18 61
3 H 2-Cl 3d 24 58
4 H 4-CH3 3e 18 68
5 4-Cl H 3b 24 75
6 4-OCH3 H 3f 36 55
7 4-F H 3g 18 82
8 4-CH3 H 3e 18 68
9 4-OCOCH3 H 3h 30 54
10 4-Br H 24 Mixture
11 4-Cl, R′ = Me H 3i 18 65
12 4-F 4-Cl 3j 24 71
13 4-Cl 4-Cl 3k 24 63
14 4-CH3 3-Cl 3l 18 66
15 4-CH3 4-Cl 3m 20 74
16 4-F 4-Br 3n 24 61
  1. The reactions were carried in Schlenk flask under Ar. Olefins (0.5 mmol), β-bromostyrenes (0.5 mmol), μ-OMs dimer–Pd (5 mol%), toluene (2 mL), k2CO3 (2.0 equiv.), 120 °C
  2. aFor entry 11, R′ = Me, for other entries, R′ = H
  3. bIsolated yield