D-Malic acid → 2-((r)-2-((r)-3-Methyl-1-((s)-3-phenyl-2-(pyrazine-2-carboxamido)propanamido)butyl)-5-oxo-1,3,2-dioxaborolan-4-yl)acetic acid

HRID 535295Notes

Reaction equation

HRID 535295 reaction equation
O1B([C@@H](NC(=O)[C@@H](NC(C2C=NC=CN=2)=O)CC2C=CC=CC=2)CC(C)C)[O:5][B:4]([C@@H:32]([NH:37][C:38](=[O:56])[C@@H:39]([NH:47][C:48]([C:50]2[CH:55]=[N:54][CH:53]=[CH:52][N:51]=2)=[O:49])[CH2:40][C:41]2[CH:46]=[CH:45][CH:44]=[CH:43][CH:42]=2)[CH2:33][CH:34]([CH3:36])[CH3:35])[O:3]B1[C@@H](NC(=O)[C@@H](NC(C1C=NC=CN=1)=O)CC1C=CC=CC=1)CC(C)C.[C:82](O)(=[O:89])[C@@H:83]([CH2:85][C:86]([OH:88])=[O:87])O>CC(C)=O>[CH3:35][CH:34]([CH3:36])[CH2:33][C@@H:32]([B:4]1[O:5][C@H:83]([CH2:85][C:86]([OH:88])=[O:87])[C:82](=[O:89])[O:3]1)[NH:37][C:38](=[O:56])[C@@H:39]([NH:47][C:48]([C:50]1[CH:55]=[N:54][CH:53]=[CH:52][N:51]=1)=[O:49])[CH2:40][C:41]1[CH:46]=[CH:45][CH:44]=[CH:43][CH:42]=1

Participants

4

Reactant 2

HCID 92824D-Malic acidHCID 60071654Bortezomib boronic anhydride

Product 1

HCID 690370992-((r)-2-((r)-3-Methyl-1-((s)-3-phenyl-2-(pyrazine-2-carboxamido)propanamido)butyl)-5-oxo-1,3,2-dioxaborolan-4-yl)acetic acid

Reagents, catalysts & solvents 1

HCID 180AcetoneSolvent

Procedure

A mixture of N,N′,N″-(boroxin-2,4,6-triyltris{[(1R)-3-methylbutane-1,1-diyl]imino[(2S)-1-oxo-3-phenylpropane-1,2-diyl]})tripyrazine-2-carboxamide (0.305 g, 0.278 mmol) and D-malic acid (130.3 mg, 0.33 mmol) were mixed in acetone (3 mL). The mixture was heated to form a solution. The solution was cooled uncontrolled until the internal temperature was about 25° C. White solid precipitated out and the resultant slurry was agitated at ambient temperature for 3 h. The slurry was filtered to collect solid 2-((R)-2-((R)-3-methyl-1-((S)-3-phenyl-2-(pyrazine-2-carboxamido)propanamido)butyl)-5-oxo-1,3,2-dioxaborolan-4-yl)acetic acid (0.410 g, 100%). [M+H] calculated for C23H28BN4O7, 483.2051. found, 483.2.

Workup

  1. temperatureThe mixture was heated
  2. customto form a solution
  3. temperatureThe solution was cooled uncontrolled until the internal temperature
  4. customwas about 25° C
  5. customWhite solid precipitated out
  6. filtrationThe slurry was filtered
  7. customto collect solid 2-((R)-2-((R)-3-methyl-1-((S)-3-phenyl-2-(pyrazine-2-carboxamido)propanamido)butyl)-5-oxo-1,3,2-dioxaborolan-4-yl)acetic acid (0.410 g, 100%)

Sources & evidence

ORD record
ord-f14d39d6cb0246bb8b5f3dfaae5aac50
Source dataset
uspto-grants-2014_10
Patent number
US08859504B2

Reaction notes

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