Triethylamine → Tert-butyl 6-(trifluoromethylsulfonyloxy)-3,4-dihydroisoquinoline-2(1H)-carboxylate

HRID 2294050Notes

Reaction equation

HRID 2294050 reaction equation
C(N(CC)CC)C.[F:8][C:9]([F:22])([F:21])[S:10]([O:13]S(C(F)(F)F)(=O)=O)(=[O:12])=[O:11].O[C:24]1[CH:25]=[C:26]2[C:31](=[CH:32][CH:33]=1)[CH2:30][N:29]([C:34]([O:36][C:37]([CH3:40])([CH3:39])[CH3:38])=[O:35])[CH2:28][CH2:27]2.C(=O)([O-])O.[Na+]>ClCCl>[F:8][C:9]([F:22])([F:21])[S:10]([O:13][C:24]1[CH:25]=[C:26]2[C:31](=[CH:32][CH:33]=1)[CH2:30][N:29]([C:34]([O:36][C:37]([CH3:40])([CH3:39])[CH3:38])=[O:35])[CH2:28][CH2:27]2)(=[O:12])=[O:11]

Participants

6

Reactant 4

HCID 8471TriethylamineHCID 67749Trifluoromethanesulfonic anhydrideHCID 516892Sodium BicarbonateHCID 10060623tert-Butyl 6-hydroxy-3,4-dihydroisoquinoline-2(1H)-carboxylate

Product 1

HCID 10091216Tert-butyl 6-(trifluoromethylsulfonyloxy)-3,4-dihydroisoquinoline-2(1H)-carboxylateYield 99.9%

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent

Procedure

Firstly 1.46 ml (0.0105 mol) of triethylamine and then 1.7 ml (0.0102 mol) of trifluoromethanesulphonic anhydride were added dropwise under argon to an ice-cold solution of 2.49 g (0.010 mol) of tert.-butyl 6-hydroxy-3,4-dihydro-1H-isoquinoline-2-carboxylate in 80 ml of dichloromethane. The mixture was stirred at room temperature for 1 hour, poured into saturated sodium hydrogen carbonate solution, extracted with ethyl acetate and completely freed from the solvents. 3.81 g of oily crude tert.-butyl 6-(trifluoromethanesulphonyloxy)-3,4-dihydro-1H-isoquinoline-2-carboxylate were obtained.

Workup

  1. extractionextracted with ethyl acetate

Sources & evidence

ORD record
ord-39ba643625024b9eaf5c18fd6cabae07
Source dataset
uspto-grants-1997_11
Patent number
US05688798

Reaction notes

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