1-Ethyl-3-(3'-dimethylaminopropyl)carbodiimide → (14S,18S)-tri-tert-butyl 1-(1-(2-(tert-butoxy)-2-oxoethyl)-1H-imidazol-2-yl)-8,16-dioxo-2-(4-(prop-2-yn-1-yloxy)benzyl)-2,9,15,17-tetraazaicosane-14,18,20-tricarboxylate

HRID 1422512Notes

Reaction equation

HRID 1422512 reaction equation
[NH2:1][CH2:2][CH2:3][CH2:4][CH2:5][C@H:6]([NH:14][C:15](=[O:34])[NH:16][C@@H:17]([CH2:25][CH2:26][C:27]([O:29][C:30]([CH3:33])([CH3:32])[CH3:31])=[O:28])[C:18]([O:20][C:21]([CH3:24])([CH3:23])[CH3:22])=[O:19])[C:7]([O:9][C:10]([CH3:13])([CH3:12])[CH3:11])=[O:8].[C:35]([O:39][C:40](=[O:68])[CH2:41][N:42]1[CH:46]=[CH:45][N:44]=[C:43]1[CH2:47][N:48]([CH2:57][C:58]1[CH:63]=[CH:62][C:61]([O:64][CH2:65][C:66]#[CH:67])=[CH:60][CH:59]=1)[CH2:49][CH2:50][CH2:51][CH2:52][CH2:53][C:54](O)=[O:55])([CH3:38])([CH3:37])[CH3:36].CCN=C=NCCCN(C)C.C1C=CC2N(O)N=NC=2C=1.CCN(C(C)C)C(C)C>ClCCCl>[C:35]([O:39][C:40](=[O:68])[CH2:41][N:42]1[CH:46]=[CH:45][N:44]=[C:43]1[CH2:47][N:48]([CH2:57][C:58]1[CH:63]=[CH:62][C:61]([O:64][CH2:65][C:66]#[CH:67])=[CH:60][CH:59]=1)[CH2:49][CH2:50][CH2:51][CH2:52][CH2:53][C:54](=[O:55])[NH:1][CH2:2][CH2:3][CH2:4][CH2:5][C@@H:6]([C:7]([O:9][C:10]([CH3:13])([CH3:12])[CH3:11])=[O:8])[NH:14][C:15](=[O:34])[NH:16][C@H:17]([C:18]([O:20][C:21]([CH3:22])([CH3:23])[CH3:24])=[O:19])[CH2:25][CH2:26][C:27]([O:29][C:30]([CH3:33])([CH3:32])[CH3:31])=[O:28])([CH3:36])([CH3:38])[CH3:37]

Participants

7

Reactant 5

HCID 159081-Ethyl-3-(3'-dimethylaminopropyl)carbodiimideHCID 757711-HydroxybenzotriazoleHCID 81531DiisopropylethylamineHCID 251942251,5-Bis(1,1-dimethylethyl) N-((((1S)-5-amino-1-((1,1-dimethylethoxy)carbonyl)pentyl)amino)carbonyl)-L-glutamateHCID 866764766-(((1-(2-(tert-butoxy)-2-oxoethyl)-1H-imidazol-2-yl)methyl)(4-(prop-2-yn-1-yloxy)benzyl)amino)hexanoic acid

Product 1

HCID 86676477(14S,18S)-tri-tert-butyl 1-(1-(2-(tert-butoxy)-2-oxoethyl)-1H-imidazol-2-yl)-8,16-dioxo-2-(4-(prop-2-yn-1-yloxy)benzyl)-2,9,15,17-tetraazaicosane-14,18,20-tricarboxylateYield 57.1%

Reagents, catalysts & solvents 1

HCID 111,2-DichloroethaneSolvent

Procedure

A solution of (S)-di-tert-butyl 2-(3-((S)-6-amino-1-(tert-butoxy)-1-oxohexan-2-yl)ureido)pentanedioate (0.480 g, 1.0 mmol), 6-(((1-(2-(tert-butoxy)-2-oxoethyl)-1H-imidazol-2-yl)methyl)(4-(prop-2-yn-1-yloxy)benzyl)amino)hexanoic acid (0.220 g, 0.468 mmol), EDCI (0.191 g, 1.0 mmol), HOBt (0.135 g, 1.0 mmol) and DIPEA (0.40 mL) in DCE (10.0 mL) was stirred at room temperature for 3 h. The solvent was evaporated to give a residue, which was purified by Biotage eluting with DCM/MeOH to give (14S,18S)-tri-tert-butyl 1-(1-(2-(tert-butoxy)-2-oxoethyl)-1H-imidazol-2-yl)-8,16-dioxo-2-(4-(prop-2-yn-1-yloxy)benzyl)-2,9,15,17-tetraazaicosane-14,18,20-tricarboxylate (0.251 g, 57%). MS (ESI), 939.5 (M+H)+.

Workup

  1. customThe solvent was evaporated
  2. customto give a residue, which
  3. customwas purified by Biotage
  4. washeluting with DCM/MeOH

Sources & evidence

ORD record
ord-ee1e85950eaf4080bfc16e10826a8fac
Source dataset
uspto-grants-2015_01
Patent number
US08926944B2

Reaction notes

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