Diisopropylethylamine → methyl N-{(2R,3R)-3-[(2S)-1-{(3R,4S,5S)-4-[{N-[(9H-fluoren-9-ylmethoxy)carbonyl]-L-valyl}(methyl)amino]-3-methoxy-5-methylheptanoyl}pyrrolidin-2-yl]-3-methoxy-2-methylpropanoyl}-L-phenylalaninate

HRID 2282864Notes

Reaction equation

HRID 2282864 reaction equation
[CH:1]1[C:13]2[CH:12]([CH2:14][O:15][C:16]([NH:18][C@H:19]([C:23]([N:25]([CH3:42])[C@@H:26]([C@@H:38]([CH3:41])[CH2:39][CH3:40])[C@H:27]([O:36][CH3:37])[CH2:28][C:29](OC(C)(C)C)=[O:30])=[O:24])[CH:20]([CH3:22])[CH3:21])=[O:17])[C:11]3[C:6](=[CH:7][CH:8]=[CH:9][CH:10]=3)[C:5]=2[CH:4]=[CH:3][CH:2]=1.Cl.[CH3:44][O:45][C@@H:46]([C@@H:64]1[CH2:68][CH2:67][CH2:66][NH:65]1)[C@@H:47]([CH3:63])[C:48]([NH:50][C@H:51]([C:59]([O:61][CH3:62])=[O:60])[CH2:52][C:53]1[CH:58]=[CH:57][CH:56]=[CH:55][CH:54]=1)=[O:49].CN(C(ON1N=NC2C=CC=NC1=2)=[N+](C)C)C.F[P-](F)(F)(F)(F)F.CCN(C(C)C)C(C)C>ClCCl>[CH:10]1[C:11]2[CH:12]([CH2:14][O:15][C:16]([NH:18][C@H:19]([C:23]([N:25]([CH3:42])[C@@H:26]([C@@H:38]([CH3:41])[CH2:39][CH3:40])[C@H:27]([O:36][CH3:37])[CH2:28][C:29]([N:65]3[CH2:66][CH2:67][CH2:68][C@H:64]3[C@H:46]([O:45][CH3:44])[C@@H:47]([CH3:63])[C:48]([NH:50][C@H:51]([C:59]([O:61][CH3:62])=[O:60])[CH2:52][C:53]3[CH:54]=[CH:55][CH:56]=[CH:57][CH:58]=3)=[O:49])=[O:30])=[O:24])[CH:20]([CH3:22])[CH3:21])=[O:17])[C:13]3[C:5](=[CH:4][CH:3]=[CH:2][CH:1]=3)[C:6]=2[CH:7]=[CH:8][CH:9]=1

Participants

6

Reactant 4

HCID 81531DiisopropylethylamineHCID 9886157Methanaminium, N-((dimethylamino)(3H-1,2,3-triazolo(4,5-b)pyridin-3-yloxy)methylene)-N-methyl-, hexafluorophosphate(1-) (1:1)HCID 86685718(3R,4S,5S)-tert-butyl 4-((S)-2-((((9H-fluoren-9-yl)methoxy)carbonyl)amino)-N,3-dimethylbutanamido)-3-methoxy-5-methylheptanoateHCID 118704819(S)-methyl 2-((2R,3R)-3-methoxy-2-methyl-3-((S)-pyrrolidin-2-yl)propanamido)-3-phenylpropanoate hydrochloride

Product 1

HCID 86685782methyl N-{(2R,3R)-3-[(2S)-1-{(3R,4S,5S)-4-[{N-[(9H-fluoren-9-ylmethoxy)carbonyl]-L-valyl}(methyl)amino]-3-methoxy-5-methylheptanoyl}pyrrolidin-2-yl]-3-methoxy-2-methylpropanoyl}-L-phenylalaninateYield 69%

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent

Procedure

To a stirring mixture of dimer acid #5 (12.1 g, 23.0 mM) and #67 (11.5 g, 23.0 mM) in 75 mL of dichloromethane under nitrogen, HATU (10.8 g, 27.6 mM) was added followed by Hunig's base (12.1 mL, 69.0 mM). The reaction was allowed to stir at room temperature for 15 hours. Reaction was concentrated to a smaller volume, taken up with ethyl acetate and washed with 1 N HCl two times. The organic layer was then washed with brine, dried over sodium sulfate, filtered, and concentrated in vacuo. Residue was then purified by silica gel chromatography (Gradient: 0% to 70% acetone in heptanes), producing #113 (12.3 g, 62%) as a white solid. LC-MS (Protocol Q): m/z 855.3 [M+H+], 877.2 [M+Na+], retention time=2.32 minutes; HPLC (Protocol R): /z 855.5 [M+H+], retention time=9.596 minutes (purity >97%).

Workup

  1. customReaction
  2. concentrationwas concentrated to a smaller volume
  3. washwashed with 1 N HCl two times
  4. washThe organic layer was then washed with brine
  5. dry with materialdried over sodium sulfate
  6. filtrationfiltered
  7. concentrationconcentrated in vacuo
  8. customResidue was then purified by silica gel chromatography (Gradient: 0% to 70% acetone in heptanes)

Sources & evidence

ORD record
ord-ba2120faf91d4fd78afdfa28b316023e
Source dataset
uspto-grants-2015_09
Patent number
US09138486B2

Reaction notes

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