3-Cyanophenylboronic acid → HCID 67174268, compound

HRID 1408808Notes

Reaction equation

HRID 1408808 reaction equation
Br[C:2]1[CH:3]=[C:4]2[C:9](=[CH:10][CH:11]=1)[O:8][CH:7]([C:12]1[CH:17]=[CH:16][CH:15]=[CH:14][CH:13]=1)[CH2:6][C:5]2=[CH2:18].[C:19]([C:21]1[CH:22]=[C:23](B(O)O)[CH:24]=[CH:25][CH:26]=1)#[N:20]>O1CCOCC1.C([O-])([O-])=O.[Cs+].[Cs+].Cl[Pd](Cl)([P](C1C=CC=CC=1)(C1C=CC=CC=1)C1C=CC=CC=1)[P](C1C=CC=CC=1)(C1C=CC=CC=1)C1C=CC=CC=1>[CH2:18]=[C:5]1[C:4]2[C:9](=[CH:10][CH:11]=[C:2]([C:25]3[CH:26]=[C:21]([CH:22]=[CH:23][CH:24]=3)[C:19]#[N:20])[CH:3]=2)[O:8][CH:7]([C:12]2[CH:17]=[CH:16][CH:15]=[CH:14][CH:13]=2)[CH2:6]1

Participants

6

Reactant 2

HCID 27343253-Cyanophenylboronic acidHCID 58424290HCID 58424290, compound

Product 1

HCID 67174268HCID 67174268, compoundYield 51%

Reagents, catalysts & solvents 3

HCID 178418476HCID 178418476, compoundCatalystHCID 10796Cesium carbonateSolventHCID 312751,4-DioxaneSolvent

Procedure

Pd(PPh3)2Cl2 (40 mg) in a 100 mL of flask under Ar2 was treated sequentially with 6-bromo-4-methylene-2-phenylchroman (200 mg, 0.67 mmol) in [1,4]dioxane (20 mL), Cs2CO3 (2 N, 3.33 mL) and 3-cyanophenylboronic acid (167 mg, 1.13 mmol). The mixture was heated under 120 at Ar2 under microwave for 30 minutes. The reaction mixture was concentrated in vacuo to give the residue, which was purified preparative TLC to give 3-(4-methylene-2-phenyl-chroman-6-yl)-benzonitrile (110 mg, 51%). 1H-NMR (CDCl3): 2.81 (m, 2H), 4.96 (d, 1H), 5.10 (m, 1H), 5.61 (d, 1H), 7.98 (d, 1H), 7.29 (m, 1H), 7.35 (m, 3H), 7.41 (m, 2H), 7.46 (m, 1H), 7.52 (m, 1H), 7.72 (m, 2H), 7.79 (d, 1H).

Workup

  1. temperatureThe mixture was heated under 120 at Ar2 under microwave for 30 minutes
  2. concentrationThe reaction mixture was concentrated in vacuo
  3. customto give the residue, which
  4. customwas purified preparative TLC

Sources & evidence

ORD record
ord-1b0d95e33b4e46b9b804802acdd236dc
Source dataset
uspto-grants-2014_12
Patent number
US08921359B2

Reaction notes

Loading…