Sodium Carbonate → methyl 6-cyclohexyl-5-(2-vinylphenyl)-4H-thieno[3,2-b]pyrrole-2-carboxylate

HRID 1008976

Reaction equation

HRID 1008976 reaction equation
Br[C:2]1[NH:6][C:5]2[CH:7]=[C:8]([C:10]([O:12][CH3:13])=[O:11])[S:9][C:4]=2[C:3]=1[CH:14]1[CH2:19][CH2:18][CH2:17][CH2:16][CH2:15]1.[CH:20]([C:22]1[CH:27]=[CH:26][CH:25]=[CH:24][C:23]=1B(O)O)=[CH2:21].C([O-])([O-])=O.[Na+].[Na+]>O1CCOCC1.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>[CH:14]1([C:3]2[C:4]3[S:9][C:8]([C:10]([O:12][CH3:13])=[O:11])=[CH:7][C:5]=3[NH:6][C:2]=2[C:23]2[CH:24]=[CH:25][CH:26]=[CH:27][C:22]=2[CH:20]=[CH2:21])[CH2:19][CH2:18][CH2:17][CH2:16][CH2:15]1

Participants

6

Reactant 3

HCID 10340Sodium CarbonateHCID 27735872-Vinylbenzeneboronic acidHCID 58679077methyl 5-bromo-6-cyclohexyl-4H-thieno[3,2-b]pyrrole-2-carboxylate

Product 1

HCID 67298999methyl 6-cyclohexyl-5-(2-vinylphenyl)-4H-thieno[3,2-b]pyrrole-2-carboxylateYield 71%

Reagents, catalysts & solvents 2

HCID 178418476HCID 178418476, compoundCatalystHCID 312751,4-DioxaneSolvent

Procedure

Methyl 5-bromo-6-cyclohexyl-4H-thieno[3,2-b]pyrrole-2-carboxylate (prepared as described in Example 7, Step 1) and (2-vinylphenyl)boronic acid (1.5 eq.) were dissolved in dioxane (0.06 M) and 2M aq. Na2CO3 (6 eq.) was added. The solution was degassed by bubbling argon, Pd(PPh3)2Cl2 (0.2 eq.) was added, and the reaction mixture was placed in an oil bath preheated to 110° C. and stirred for 1 h; after removing all volatiles the title compound was isolated by chromatography (PE/EtOAc 10:1). Yield: 71%. 1H-NMR (400 MHz, CDCl3, 300 K, δ) 8.16 (bs, 1H), 7.69 (d, 1H, J 7.9), 7.68 (s, 1H), 7.45-7.35 (m, 3H), 6.67 (dd, 1H, J 17.5, 11.0), 5.74 (d, 1H, J 17.5), 5.25 (d, 1H, J 11.0), 3.91 (s, 3H), 2.54-2.47 (m, 1H), 1.81-1.23 (m, 10H); MS (ES+) m/z 366 (M+H)+.

Workup

  1. customThe solution was degassed
  2. additionwas added
  3. customthe reaction mixture was placed in an oil bath
  4. custompreheated to 110° C.
  5. customafter removing all volatiles the title compound
  6. customwas isolated by chromatography (PE/EtOAc 10:1)

Sources & evidence

ORD record
ord-d95d8e1b59684113b8a0006376ae03ef
Source dataset
uspto-grants-2011_07
Patent number
US07973026B2

Linked notes

Loading…