From: Suzuki–Miyaura cross-couplings for alkyl boron reagent: recent developments—a review
Substrates | Boron reagents | Reaction conditions | Schemes | References |
---|---|---|---|---|
Aryl iodides | Ttrialkylboranes and B-alkyl-9-BBN | PdCl2(dppf), NaOH, THF, reflux, | 3A | [80] |
Aryl iodides and bromides | Alkylboranes | PdCl2(dppf), NaOH, THF, 65 ◦C | 3B | |
Aryl halides | B-boronic acids and a B-alkyl-9-BBN | Pd(OAc)2, SPhos, K3PO4.H2O, THF/Toluene | 3C | [84] |
Chloroenzynes | B-benzyl-9-BBN | Pd(PPh3)4, Cs2CO3, water | 4 | [85] |
CAr-O electrophiles | B-alkyl-9-BBN | Ni(COD)2, IPr.HCl, CssCO3, iPr2 O, 110 °C , 12 h | 5A | [89] |
Aromatic and alkenyl ethers | B-alkyl-9-BBN | Ni(COD)2, PCy3, base, iPr2O, 110 °C , | 5B, C | [90] |
Aryl halides | 9-BBN and 1,3-dienes | Pd(dppf)Cl2 or Pd(dppb)Cl2N | 6 | [91] |
β-triflyl enones | B-alkyl-9-BBN | Pd(dppf)Cl2, Cs2CO3, DMF:THF:H2O, 60 °C , 16 h | 7A | [92] |
Halogenated pyridine | 9-BBN derivatives of L-aspartic acid | Pd(PPh3)4, K3PO4 (aq.), THF 50 °C , | 7B | [93] |
Aromatic esters | Alkyl organoboron reagents | Ni(COD)2, dcype, CsF, toluene | 8A | [95] |
Aroyl fluorides | Alkyl organoboron reagents | Ni(COD)2, dppe, CsF, | 8B | [96] |
Aryl halides/triflates and vinyl triflates | Potassium alkyltrifluoroborates | PdCl2(dppf)CH2Cl Cs2CO3, THF: H2O, reflux, 6–72 h | 10B | |
Aryl and heteroaryl chlorides and bromides | Tertiary trifluoroborate salts | CatacXium-A-Pd G3, Cs2CO3, tol/water, 90 °C , 18 h | 10C | [104] |
Aryl bromides | Secondary alkyl β-trifluoroboratoketones and esters | Ir[dFCF3ppy]2(bpy)PF6, NiCl2 dme, dtbbpy, Cs2CO3, 2,6-lutidine, 1,4-dioxane, hv | 11A | [10] |
Aryl bromides | α-alkoxyalkyl- and α-acyloxyalkyltrifluoroborates | Ir[dFCF3ppy]2(bpy)PF6, Ni(COD)2, dtbbpy, K2HPO4, dioxane, hv | 11B | [106] |
Aryl bromides | Tertiary organotrifluoroborates reagents | Ir[dFCF3ppy]2(bpy)PF6, Ni(TMHD)2 or Ni(dtbbpy)(H2O)4Cl2, K2HPO4 or Na2CO3, no additive or ZnBr2, dioxane/DMA or DMA, hv, 12–72 h | 11C | [107] |
Aryl bromides | Trialkylboranes | PdCl2(dppf), THF, reflux, 2–6 h | 13B | |
Aryl halides and triflates | NHC–borane complexes | [Pd], Ligand, tol-H2O or THF-H2O, heat or microwave | 13C | [113] |
Alkenyl and aryl halides | Trialkyl- and triaryl-boranes (generated in situ) | Pd(OAc)2, n-BuAd2P or RuPhos, K3PO4, tol-H2O, 100 °C | 13D | [114] |
Alkenyl and aryl Halides and triflates | n-alkylboronic acids | PdCl2(dppf), K2CO3, Ag2O, THF, 80 °C , 6–10 h | 14A | [118] |
Alkenyl halides | n-alkylboronic acids | PdCl(C3H5)dppb, Cs2CO3, toluene | 14B | [119] |
2-Bromoalken-3-ol derivatives | Primary and secondary alkylboronic acids | Pd(OAc)2,LBPhos.HBFK2CO3, toluene, 110 °C , 3–27 h | 14C | [120] |
Di-ortho-substituted arylhalides | Cyclic secondary alkylboronic acids | Pd(OAc)2, AntPhos, K3PO4, toluene, 110 °C , 12–24 h | 14D | [121] |
Aryl and alkenyl triflates | Acyclic secondary alkylboronic acids | [Pd(cinnamyl)Cl]2, Ligand, K3PO4.H2O, toluene, 110 °C , 12 h | 14E | [122] |
Aryl methyl ethers bearing ortho-carbonyls | Boronic esters | RuH2(CO)(PPh3)3, toluene, 110 ◦C | 16A | [123] |
Aryl and heteroarylbromides | MIDA boronates | PdCl2(dppf).CH2Cl2, Cs2CO3, THF:H2O, 80 ◦C, 24–48 h | 17 | [47] |
Alkenyl bromide | Alkyl iodide and 9-MeO-9BBN (tBuLi for in situ generation) | Pd(OAc)2, Aphos-Y | 18B | [133] |
Aryl bromide | OBBD derivatives | Pd(dtbpf)Cl2, Et3N or K3PO4, TPGS-750-M/H2O 45 °C , Ar, 16–21 h | 18D | [134] |
Styrene | 9-BBN | THF, SPhos and Pd(OAc)2 at 50 °C, 24 h | 9 | [97] |
Aldehydes/ketones | Benzyl Trifluoroborates | 4Cz-IPN, r.t. DMSO | 12 | [108] |
Allyl bromides | Arylboronic acids | S-Catalyst and weak base | 15 | [122] |