Diisopropylethylamine → Tert-Butyl 4-(2-(3-formylphenoxy)acetyl)piperazine-1-carboxylate

HRID 592075Notes

Reaction equation

HRID 592075 reaction equation
[CH:1]([C:3]1[CH:4]=[C:5]([CH:11]=[CH:12][CH:13]=1)[O:6][CH2:7][C:8]([OH:10])=O)=[O:2].[N:14]1([C:20]([O:22][C:23]([CH3:26])([CH3:25])[CH3:24])=[O:21])[CH2:19][CH2:18][NH:17][CH2:16][CH2:15]1.CN(C(ON1N=NC2C=CC=NC1=2)=[N+](C)C)C.F[P-](F)(F)(F)(F)F.CCN(C(C)C)C(C)C>C(Cl)Cl.CN(C1C=CN=CC=1)C>[CH:1]([C:3]1[CH:4]=[C:5]([CH:11]=[CH:12][CH:13]=1)[O:6][CH2:7][C:8]([N:17]1[CH2:16][CH2:15][N:14]([C:20]([O:22][C:23]([CH3:26])([CH3:25])[CH3:24])=[O:21])[CH2:19][CH2:18]1)=[O:10])=[O:2]

Participants

7

Reactant 4

HCID 81531DiisopropylethylamineHCID 143452tert-Butyl piperazine-1-carboxylateHCID 6018952-(3-Formylphenoxy)acetic acid2×HCID 9886157Methanaminium, N-((dimethylamino)(3H-1,2,3-triazolo(4,5-b)pyridin-3-yloxy)methylene)-N-methyl-, hexafluorophosphate(1-) (1:1)

Product 1

HCID 89725867Tert-Butyl 4-(2-(3-formylphenoxy)acetyl)piperazine-1-carboxylateYield 29%

Reagents, catalysts & solvents 2

HCID 142844-(Dimethylamino)pyridineCatalystHCID 6344DichloromethaneSolvent2×

Procedure

2-(3-formylphenoxy)acetic acid (48)/(1 eq), tert-butyl piperazine-1-carboxylate (1.5 eq) were taken in DCM to which HATU (1.3 eq) and DIPEA (2 eq) along with cat. DMAP were added and the traction mixture was stirred at rt for 16 h when TLC indicated completion of reaction. The reaction mixture was diluted with DCM and the organic extract was washed with water, dried and purified by column chromatography using silica gel (100-200 mesh) to afford the pure product (29%) as a colorless oil. LCMS: 91.65% (M++1-Boc).

Workup

  1. customcompletion of reaction
  2. extractionthe organic extract
  3. washwas washed with water
  4. customdried
  5. custompurified by column chromatography

Sources & evidence

ORD record
ord-92e93f901bf943e08fc2debccf35cc1b
Source dataset
uspto-grants-2016_01
Patent number
US09238656B2

Reaction notes

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