Ethylmorpholine → (R)-N-[(RS)-1-amidino-3-piperidinylmethyl]-alpha(2-naphthylsulfonamido)indole-3-propionamide bisulfite

HRID 257272Notes

Reaction equation

HRID 257272 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](O)=[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(N1CCOCC1)C.[S:37]([OH:40])([OH:39])=[O:38].[NH2:41][CH2:42][CH:43]1[CH2:48][CH2:47][CH2:46][N:45]([C:49](=[NH:51])[NH2:50])[CH2:44]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>[S:37](=[O:38])([OH:40])[OH:39].[C:49]([N:45]1[CH2:46][CH2:47][CH2:48][CH:43]([CH2:42][NH:41][C:26](=[O:27])[C@H:15]([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])[CH2:16][C:17]2[C:25]3[C:20](=[CH:21][CH:22]=[CH:23][CH:24]=3)[NH:19][CH:18]=2)[CH2:44]1)(=[NH:50])[NH2:51]

Participants

6

Reactant 4

HCID 7525EthylmorpholineHCID 151348Benzotriazol-1-yloxy-tris(dimethylamino)phosphonium hexafluorophosphateHCID 1800786(R)-3-(1H-Indol-3-yl)-2-(naphthalene-2-sulfonylamino)-propionic acidHCID 19080933Rac-3aminomethyl-1-amidinopiperidine sulphite

Product 1

HCID 22848479(R)-N-[(RS)-1-amidino-3-piperidinylmethyl]-alpha(2-naphthylsulfonamido)indole-3-propionamide bisulfiteYield 44.3%

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Procedure

A solution of 1.5 g of N-(2-naphthylsulfonyl)-D-tryptophan in 30 ml of DMF is treated with 1.5 ml of ethylmorpholine. After the addition of 0.7 g of rac-3-aminomethyl-1-amidinopiperidine sulphite (Example 1) and 1.7 g of benzotriazol-1-yloxy-tris(dimethylamino)phosphonium hexafluorophosphate the reaction mixture is stirred for 15 hours. The solvent is evaporated and the residue is taken up in 50 ml of water and extracted with 100 ml of ethyl acetate. The ethyl acetate phase is washed with water, dried and evaporated. The crude material is purified on a RP-18 column with water/acetonitrile (0-30%). There is obtained 0.8 g of (R)-N-[(RS)-1-amidino-3-piperidinylmethyl]-α(2-naphthylsulfonamido)indole-3-propionamide bisulfite, FAB-MS: 533 (M+H)+.

Workup

  1. customThe solvent is evaporated
  2. extractionextracted with 100 ml of ethyl acetate
  3. washThe ethyl acetate phase is washed with water
  4. customdried
  5. customevaporated
  6. customThe crude material is purified on a RP-18 column with water/acetonitrile (0-30%)

Sources & evidence

ORD record
ord-be2b33d8263a45e3b3f0c0cb36226db3
Source dataset
uspto-grants-1993_11
Patent number
US05260307

Reaction notes

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