Acetic Anhydride → HCID 90240954, compound

HRID 880344Notes

Reaction equation

HRID 880344 reaction equation
[CH2:1]1[C:10]2[C:5](=[CH:6][CH:7]=[CH:8][CH:9]=2)[CH2:4][CH2:3][N:2]1[CH2:11][C@@H:12]([OH:30])[CH2:13][NH:14][C:15](=[O:29])[C:16]1[CH:21]=[CH:20][N:19]=[C:18]([NH:22][CH:23]2[CH2:28][CH2:27][NH:26][CH2:25][CH2:24]2)[CH:17]=1.CCN(CC)CC.[CH3:38][C:39](OC(C)=O)=[O:40]>C(Cl)Cl>[C:39]([N:26]1[CH2:27][CH2:28][CH:23]([NH:22][C:18]2[CH:17]=[C:16]([CH:21]=[CH:20][N:19]=2)[C:15]([NH:14][CH2:13][C@H:12]([OH:30])[CH2:11][N:2]2[CH2:3][CH2:4][C:5]3[C:10](=[CH:9][CH:8]=[CH:7][CH:6]=3)[CH2:1]2)=[O:29])[CH2:24][CH2:25]1)(=[O:40])[CH3:38]

Participants

5

Reactant 3

HCID 7918Acetic AnhydrideHCID 8471TriethylamineHCID 90241690HCID 90241690, compound

Product 1

HCID 90240954HCID 90240954, compound

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent

Conditions

Temperature
20 °C

Procedure

To a stirred mixture of (S)—N-(3-(3,4-dihydroisoquinolin-2(1H)-yl)-2-hydroxypropyl)-2-(piperidin-4-ylamino)isonicotinamide (70 g), and Et3N (40 g) in DCM (2000 mL) was added Ac2O (17 g) dropwise over 1 h at 0° C. After addition, the mixture was warmed to 20° C. and stirring was continued for another 1 h, at which time TLC showed the reaction was completed. The reaction mixture was washed with water (500 mL), and the organic phase dried and concentrated. The residue was then purified by flash chromatography (EtOAc˜DCM:MeOH=10:1) to give crude product. Five batches were run in parallel and produced a combined crude product weight of 400 g. This crude was further purified by preparative HPLC to give the pure product (310 g, >98% purity, free base form). 1H NMR (400 MHz, MeOD-d4) 7.94-7.92 (d, 7.0 Hz, 1H), 7.14-7.05 (m, 4H), 6.87 (s, 1H), 6.76-6.74 (m, 1H), 4.44 (m, 1H), 4.10 (m, 1H), 3.96-3.94 (m, 2H), 3.75 (s, 2H), 3.52 (m, 2H), 3.33-3.32 (m, 1H), 2.92-2.86 (m, 5H), 2.67 (m, 2H), 2.13-2.00 (m, 5H), 1.44-1.37 (m, 2H); LCMS (m/z): 452.3 [M+H]+

Workup

  1. additionAfter addition
  2. washThe reaction mixture was washed with water (500 mL)
  3. customthe organic phase dried
  4. concentrationconcentrated
  5. customThe residue was then purified by flash chromatography (EtOAc˜DCM:MeOH=10:1)
  6. customto give crude product

Sources & evidence

ORD record
ord-f7df70ea2ed54a5ab4c39f4d88564acf
Source dataset
uspto-grants-2015_03
Patent number
US08993555B2

Reaction notes

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