Acetic Anhydride → HCID 178475065, compound

HRID 1985034Notes

Reaction equation

HRID 1985034 reaction equation
[NH:1]([C:37](OCC1C2C(=CC=CC=2)C2C1=CC=CC=2)=[O:38])[C@H:2]([C:10]([NH:12][C@H:13]([C:34]([OH:36])=[O:35])[CH2:14][CH2:15][CH2:16][CH2:17][NH:18][C:19](=[C:24]1[C:32](=[O:33])[CH2:31][C:28]([CH3:30])([CH3:29])[CH2:27][C:25]1=[O:26])[CH2:20][CH:21]([CH3:23])[CH3:22])=[O:11])[CH2:3][C:4]1[CH:9]=[CH:8][CH:7]=[CH:6][CH:5]=1.N1CCCC[CH2:55]1.N[C@H](C(N[C@H](C(O)=O)CCCCNC(=C1C(=O)CC(C)(C)CC1=O)CC(C)C)=O)CC1C=CC=CC=1.C(OC(=O)C)(=O)C>CN(C=O)C>[NH:1]([C:37]([CH3:55])=[O:38])[C@H:2]([C:10]([NH:12][C@H:13]([C:34]([OH:36])=[O:35])[CH2:14][CH2:15][CH2:16][CH2:17][NH:18][C:19](=[C:24]1[C:25](=[O:26])[CH2:27][C:28]([CH3:29])([CH3:30])[CH2:31][C:32]1=[O:33])[CH2:20][CH:21]([CH3:23])[CH3:22])=[O:11])[CH2:3][C:4]1[CH:9]=[CH:8][CH:7]=[CH:6][CH:5]=1

Participants

6

Reactant 4

HCID 7918Acetic AnhydrideHCID 8082PiperidineHCID 178446354HCID 178446354, compoundHCID 178446355HCID 178446355, compound

Product 1

HCID 178475065HCID 178475065, compound

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Procedure

To the deprotected Lys-resin sample was added Fmoc-Phe (8.8 mg, 33.2 μmol) in DCM/DMF and 1,3-diisopropylcarbodiimide (DIC) (3 μL, 20 μmol). The coupling reaction was continued for 2 h and ninhydrin tests gave negative amino group readings. The Fmoc-Phe-Lys(ivDde) on resin was then treated with photogenerated piperidine as described above. Upon completion of the reaction, the resin was washed with DCM/DMF. Capping of the NH2-Phe-Lys(ivDde)-resin was carried out for 1 h with acetic anhydride (470 μL, 5 mmol) and TEA (700 μL, 5 mmol) in 1.5 mL DMF to give Ac-Phe-Lys(ivDde)-resin.

Workup

  1. customUpon completion of the reaction
  2. washthe resin was washed with DCM/DMF

Sources & evidence

ORD record
ord-8331de8c67cb405a84b6713f3b531dde
Source dataset
uspto-grants-2009_06
Patent number
US07544829B2

Reaction notes

Loading…