Tetrahydrofuran → (+)-(4aR)-(10bR)-4-methyl-8-(6-benzothiazolyl)-10b-methyl-1,2,3,4,4a,5,6,10b-octahydrobenzo[f]quinolin-3-one

HRID 1079229Notes

Reaction equation

HRID 1079229 reaction equation
Br[C:2]1[CH:10]=[CH:9][C:5]2[N:6]=[CH:7][S:8][C:4]=2[CH:3]=1.[C:11](=[O:14])([O-])[O-].[Na+].[Na+].[CH2:17]1[CH2:21]O[CH2:19][CH2:18]1>C(Cl)(Cl)Cl.[Pd].C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1>[CH3:7][N:6]1[C@H:5]2[C@@:17]([CH3:21])([C:17]3[CH:21]=[CH:10][C:2]([C:2]4[CH:10]=[CH:9][C:5]5[N:6]=[CH:7][S:8][C:4]=5[CH:3]=4)=[CH:3][C:18]=3[CH2:19][CH2:4]2)[CH2:18][CH2:19][C:11]1=[O:14]

Participants

6

Reactant 3

HCID 8028TetrahydrofuranHCID 10340Sodium CarbonateHCID 27951716-Bromo-1,3-benzothiazole

Product 1

HCID 53675922(+)-(4aR)-(10bR)-4-methyl-8-(6-benzothiazolyl)-10b-methyl-1,2,3,4,4a,5,6,10b-octahydrobenzo[f]quinolin-3-oneYield 47%

Reagents, catalysts & solvents 2

HCID 11979704Tetrakis(triphenylphosphine)palladiumCatalystHCID 6212ChloroformSolvent

Procedure

A 15 mL round bottom flask was charged with (+)-(4aR)-(10bR)-4-methyl-10b-methyl-1,2,3,4,4a,5,6,10b-octahydrobenzo[f]quinolin-3-one-8-boronic acid(178 mg, 0.65 mmol), tetrakis (triphenylphosphine) palladium (0) (23 mg, 0.02 mmol), 6-bromobenzothiazole (139 mg, 0.65 mmol), 0.65 mL of 2M aqueous sodium carbonate and 2 mL of THF, fitted with a reflux condenser, and the stirred mixture was heated at 80°, under nitrogen, for 24 h. The mixture was cooled, diluted with chloroform (75 mL) and washed with brine (2×25 mL). The combined organic extracts were dried over sodium sulfate, concentrated, and purified by silica gel chromatography (20% ethyl acetate/hexanes eluent) to give 106 mg (47%) of the title compound as an amorphous solid. mp 183°-187°. FDMS: m/e=362. α[D]589 =+87.80 (c=0.55, chloroform).

Workup

  1. customfitted with a reflux condenser
  2. temperaturethe stirred mixture was heated at 80°, under nitrogen, for 24 h
  3. temperatureThe mixture was cooled
  4. washwashed with brine (2×25 mL)
  5. dry with materialThe combined organic extracts were dried over sodium sulfate
  6. concentrationconcentrated
  7. custompurified by silica gel chromatography (20% ethyl acetate/hexanes eluent)

Sources & evidence

ORD record
ord-166f99e0ab7f44608805b377c9b1d5ab
Source dataset
uspto-grants-1996_08
Patent number
US05550134

Reaction notes

Loading…