Diisopropylethylamine → N-(2-naphthylsulfonyl)-D-tryptophan (S)-1-t-butyoxycarbonyl-3-piperidinylmethyl ester

HRID 257273Notes

Reaction equation

HRID 257273 reaction equation
[CH:1]1[C:10]2[C:5](=[CH:6][CH:7]=[CH:8][CH:9]=2)[CH:4]=[CH:3][C:2]=1[S:11]([NH:14][C@@H:15]([C:26]([OH:28])=[O:27])[CH2:16][C:17]1[C:25]2[C:20](=[CH:21][CH:22]=[CH:23][CH:24]=2)[NH:19][CH:18]=1)(=[O:13])=[O:12].C(N(C(C)C)C(C)C)C.O[CH2:39][C@H:40]1[CH2:45][CH2:44][CH2:43][N:42]([C:46]([O:48][C:49]([CH3:52])([CH3:51])[CH3:50])=[O:47])[CH2:41]1.F[P-](F)(F)(F)(F)F.N1(O[P+](N(C)C)(N(C)C)N(C)C)C2C=CC=CC=2N=N1>CN(C=O)C>[C:49]([O:48][C:46]([N:42]1[CH2:43][CH2:44][CH2:45][C@H:40]([CH2:39][O:27][C:26](=[O:28])[C@@H:15]([CH2:16][C:17]2[C:25]3[C:20](=[CH:21][CH:22]=[CH:23][CH:24]=3)[NH:19][CH:18]=2)[NH:14][S:11]([C:2]2[CH:3]=[CH:4][C:5]3[C:10](=[CH:9][CH:8]=[CH:7][CH:6]=3)[CH:1]=2)(=[O:13])=[O:12])[CH2:41]1)=[O:47])([CH3:52])([CH3:50])[CH3:51]

Participants

6

Reactant 4

HCID 81531DiisopropylethylamineHCID 151348Benzotriazol-1-yloxy-tris(dimethylamino)phosphonium hexafluorophosphateHCID 1514448tert-Butyl (3S)-3-(hydroxymethyl)piperidine-1-carboxylateHCID 1800786(R)-3-(1H-Indol-3-yl)-2-(naphthalene-2-sulfonylamino)-propionic acid

Product 1

HCID 70046983N-(2-naphthylsulfonyl)-D-tryptophan (S)-1-t-butyoxycarbonyl-3-piperidinylmethyl esterYield 66.7%

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Procedure

A solution of 1.0 g of N-2-naphthylsulfonyl-(D)-tryptophan in 20 ml of DMF is treated with 0.5 ml of ethyldiisopropylamine. After the addition of 0.6 g of t-butyl (S)-3-hydroxymethyl-1-piperidinecarboxylate (Example 3c) and 1.1 g of benzotriazol-1-yloxy-tris(dimethylamino)phosphoniumhexafluorophosphate the reaction mixture is stirred for 15 hours. The solvent is evaporated and the residue is taken up in water and extracted with ethyl acetate. The ethyl acetate phase is washed with water, dried and evaporated. Chromatography over silica gel with ethyl acetate gives 1.0 g of N-(2-naphthylsulfonyl)-D-tryptophan (S)-1-t-butyoxycarbonyl-3-piperidinylmethyl ester.

Workup

  1. customThe solvent is evaporated
  2. extractionextracted with ethyl acetate
  3. washThe ethyl acetate phase is washed with water
  4. customdried
  5. customevaporated

Sources & evidence

ORD record
ord-fb8156a1562e444b925c421467effe31
Source dataset
uspto-grants-1993_11
Patent number
US05260307

Reaction notes

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