Triethylamine → Benzo[b]thiophen-2-yl(9-(3-(2-(tert-butyldimethylsilyloxy)ethyl)-2-fluorobenzyl)-1-oxa-4,9-diazaspiro[5.5]undecan-4-yl)methanone

HRID 1689409

Reaction equation

HRID 1689409 reaction equation
CN(C(ON1N=NC2C=CC=NC1=2)=[N+](C)C)C.F[P-](F)(F)(F)(F)F.[S:25]1[C:29]([C:30]([OH:32])=O)=[CH:28][C:27]2[CH:33]=[CH:34][CH:35]=[CH:36][C:26]1=2.[Si:37]([O:44][CH2:45][CH2:46][C:47]1[C:48]([F:65])=[C:49]([CH:62]=[CH:63][CH:64]=1)[CH2:50][N:51]1[CH2:61][CH2:60][C:54]2([O:59][CH2:58][CH2:57][NH:56][CH2:55]2)[CH2:53][CH2:52]1)([C:40]([CH3:43])([CH3:42])[CH3:41])([CH3:39])[CH3:38].C(N(CC)CC)C>CN(C=O)C>[S:25]1[C:29]([C:30]([N:56]2[CH2:55][C:54]3([CH2:53][CH2:52][N:51]([CH2:50][C:49]4[CH:62]=[CH:63][CH:64]=[C:47]([CH2:46][CH2:45][O:44][Si:37]([C:40]([CH3:42])([CH3:41])[CH3:43])([CH3:38])[CH3:39])[C:48]=4[F:65])[CH2:61][CH2:60]3)[O:59][CH2:58][CH2:57]2)=[O:32])=[CH:28][C:27]2[CH:33]=[CH:34][CH:35]=[CH:36][C:26]1=2

Participants

6

Reactant 4

HCID 8471TriethylamineHCID 95864Benzo(b)thiophene-2-carboxylic acidHCID 9886157Methanaminium, N-((dimethylamino)(3H-1,2,3-triazolo(4,5-b)pyridin-3-yloxy)methylene)-N-methyl-, hexafluorophosphate(1-) (1:1)HCID 579891399-(3-(2-(tert-Butyldimethylsilyloxy)ethyl)-2-fluorobenzyl)-1-oxa-4,9-diazaspiro[5.5]undecane

Product 1

HCID 57989142Benzo[b]thiophen-2-yl(9-(3-(2-(tert-butyldimethylsilyloxy)ethyl)-2-fluorobenzyl)-1-oxa-4,9-diazaspiro[5.5]undecan-4-yl)methanone

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Procedure

2-(3H-[1,2,3]Triazolo[4,5-b]pyridin-3-yl)-1,1,3,3-tetramethylisouronium hexafluorophosphate(V) (0.378 g) was added to a stirred solution of benzo[b]thiophene-2-carboxylic acid (0.186 g), 9-(3-(2-(tert-butyldimethylsilyloxy)ethyl)-2-fluorobenzyl)-1-oxa-4,9-diazaspiro[5.5]undecane (example 78, step d) (0.40 g), and triethylamine (0.383 g) in DMF (4 mL). After 1 h, the reaction mixture was partitioned between water and ethyl acetate. The ethyl acetate layer was washed twice with water and once with brine, dried over magnesium sulphate, filtered and evaporated in vacuo. Purification by silica gel chromatography eluting with 7:1:0.5, isohexane:ethyl acetate:triethylamine gave the subtitled compound as a gum. Yield 0.38 g.

Workup

  1. customthe reaction mixture was partitioned between water and ethyl acetate
  2. washThe ethyl acetate layer was washed twice with water and once with brine
  3. dry with materialdried over magnesium sulphate
  4. filtrationfiltered
  5. customevaporated in vacuo
  6. customPurification by silica gel chromatography
  7. washeluting with 7:1:0.5, isohexane

Sources & evidence

ORD record
ord-37b08ba1058041e4b81bdb8a30fe2c3c
Source dataset
uspto-grants-2012_04
Patent number
US08148373B2

Linked notes

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