Trifluoroacetic acid → 3-[4-(benzyloxy)-2-hydroxyphenyl]-1-(diphenylmethyl)-1,3-dihydro-2H-indol-2-one

HRID 1407452Notes

Reaction equation

HRID 1407452 reaction equation
[CH2:1]([O:8][C:9]1[CH:14]=[CH:13][C:12]([C:15]2(O)[C:23]3[C:18](=[CH:19][CH:20]=[CH:21][CH:22]=3)[N:17]([CH:24]([C:31]3[CH:36]=[CH:35][CH:34]=[CH:33][CH:32]=3)[C:25]3[CH:30]=[CH:29][CH:28]=[CH:27][CH:26]=3)[C:16]2=[O:37])=[C:11]([OH:39])[CH:10]=1)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.C([SiH](CC)CC)C.FC(F)(F)C(O)=O>>[CH2:1]([O:8][C:9]1[CH:14]=[CH:13][C:12]([CH:15]2[C:23]3[C:18](=[CH:19][CH:20]=[CH:21][CH:22]=3)[N:17]([CH:24]([C:25]3[CH:26]=[CH:27][CH:28]=[CH:29][CH:30]=3)[C:31]3[CH:32]=[CH:33][CH:34]=[CH:35][CH:36]=3)[C:16]2=[O:37])=[C:11]([OH:39])[CH:10]=1)[C:2]1[CH:3]=[CH:4][CH:5]=[CH:6][CH:7]=1

Participants

4

Reactant 3

HCID 6422Trifluoroacetic acidHCID 12052TriethylsilaneHCID 66672327[4-(benzyloxy)-2-hydroxyphenyl]-1-(diphenylmethyl)-3-hydroxy-1,3-dihydro-2H-indol-2-one

Product 1

HCID 666724983-[4-(benzyloxy)-2-hydroxyphenyl]-1-(diphenylmethyl)-1,3-dihydro-2H-indol-2-oneYield 76.3%

Conditions

Temperature
0 °C

Procedure

A mixture of 3-[4-(benzyloxy)-2-hydroxyphenyl]-1-(diphenylmethyl)-3-hydroxy-1,3-dihydro-2H-indol-2-one (10.0 g, 19.5 mmol), triethylsilane (15.6 mL, 97.5 mmol) and trifluoroacetic acid (15.0 mL, 195 mmol) was mixed and stirred for 20 min at 0° C. The mixture was concentrated under vacuum. The residue was triturated with diethyl ether to afford 3-[4-(benzyloxy)-2-hydroxyphenyl]-1-(diphenylmethyl)-1,3-dihydro-2H-indol-2-one (7.40 g, 76%) as a colorless solid: 1H NMR (300 MHz, CDCl3) δ7.44-7.25 (m, 14H), 7.23-7.17 (m, 2H), 7.11-7.02 (m, 2H), 6.95 (s, 1H), 6.81 (d, J=8.6 Hz, 1H), 6.68 (d, J=2.5 Hz, 1H), 6.55-6.49 (m, 1H), 6.46 (dd, J=8.6, 2.6 Hz, 1H), 5.09 (s, 1H), 4.99 (s, 2H); MS (ES+) m/z 498.3 (M+1).

Workup

  1. additionwas mixed
  2. concentrationThe mixture was concentrated under vacuum
  3. customThe residue was triturated with diethyl ether

Sources & evidence

ORD record
ord-5df8a8ab4c584113a4b16c9c397938f1
Source dataset
uspto-grants-2014_12
Patent number
US08916580B2

Reaction notes

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