Caffeic Acid → (2S)-N-[2-(3,4-dihydroxyphenyl)ethyl]-2-[[(E)-3-(3,4-dihydroxyphenyl)prop-2-enoyl]amino]-N'-trityl-butanediamide

HRID 1860322Notes

Reaction equation

C1C2C(COC([NH:18][C@H:19]([C:43]([NH:45][CH2:46][CH2:47][C:48]3[CH:55]=[CH:54][C:52]([OH:53])=[C:50]([OH:51])[CH:49]=3)=[O:44])[CH2:20][C:21](=[O:42])[NH:22][C:23]([C:36]3[CH:41]=[CH:40][CH:39]=[CH:38][CH:37]=3)([C:30]3[CH:35]=[CH:34][CH:33]=[CH:32][CH:31]=3)[C:24]3[CH:29]=[CH:28][CH:27]=[CH:26][CH:25]=3)=O)C3C(=CC=CC=3)C=2C=CC=1.[C:56]([OH:68])(=O)/[CH:57]=[CH:58]/[C:59]1[CH:66]=[CH:65][C:63]([OH:64])=[C:61]([OH:62])[CH:60]=1>>[C:56]([NH:18][C@H:19]([C:43]([NH:45][CH2:46][CH2:47][C:48]1[CH:55]=[CH:54][C:52]([OH:53])=[C:50]([OH:51])[CH:49]=1)=[O:44])[CH2:20][C:21](=[O:42])[NH:22][C:23]([C:30]1[CH:35]=[CH:34][CH:33]=[CH:32][CH:31]=1)([C:36]1[CH:41]=[CH:40][CH:39]=[CH:38][CH:37]=1)[C:24]1[CH:29]=[CH:28][CH:27]=[CH:26][CH:25]=1)(=[O:68])/[CH:57]=[CH:58]/[C:59]1[CH:66]=[CH:65][C:63]([OH:64])=[C:61]([OH:62])[CH:60]=1

Participants

Reactant 2

HCID 689043Caffeic Acid

HCID 22976130N-[Nalpha-(9-fluorenylmethoxycarbonyl)-Ngamma-trityl-L-asparagyl]dopamine

Product 1

HCID 6478497(2S)-N-[2-(3,4-dihydroxyphenyl)ethyl]-2-[[(E)-3-(3,4-dihydroxyphenyl)prop-2-enoyl]amino]-N'-trityl-butanediamide

Procedure

N-[Nα-(9-fluorenylmethoxycarbonyl)-Nγ-trityl-L-asparagyl]dopamine (1.0 g, 1.5 mmol) was deprotected according to the indications of general procedure G. The intermediate was coupled with caffeic acid (348 mg, 2.2 mmol) following general procedure D. The crude material was purified by flash chromatography using a solvent gradient from 30% to 70% EtOAc/CHCl3 containing 1% AcOH. The final product was obtained as yellow powder (400 mg, 44%).

Workup

customThe crude material was purified by flash chromatography

Sources & evidence

ORD record: ord-90e94520d71246bfa99f7a91fecf4f63
Source dataset: uspto-grants-2003_03
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US06528655B1

Reaction notes

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