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tert-Butanol → 2-Methyl-2-[3-(3-{4-[7-(2-morpholin-4-yl-ethoxy)-benzo[d]imidazo[2,1-b]thiazol-2-yl]-phenyl}-ureido)-isoxazol-5-yl]-propionic acid

HRID 1038333
Notes
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Reaction equation

HRID 1038333 reaction equation
[CH3:1][C:2]([C:6]1[O:10][N:9]=[C:8]([NH:11][C:12]([NH:14][C:15]2[CH:20]=[CH:19][C:18]([C:21]3[N:22]=[C:23]4[N:27]([CH:28]=3)[C:26]3[CH:29]=[CH:30][C:31]([O:33][CH2:34][CH2:35][N:36]5[CH2:41][CH2:40][O:39][CH2:38][CH2:37]5)=[CH:32][C:25]=3[S:24]4)=[CH:17][CH:16]=2)=[O:13])[CH:7]=1)([CH3:5])[CH:3]=[O:4].C([OH:46])(C)(C)C.CC(=CC)C.Cl([O-])=O.[Na+]>O>[CH3:5][C:2]([C:6]1[O:10][N:9]=[C:8]([NH:11][C:12]([NH:14][C:15]2[CH:16]=[CH:17][C:18]([C:21]3[N:22]=[C:23]4[N:27]([CH:28]=3)[C:26]3[CH:29]=[CH:30][C:31]([O:33][CH2:34][CH2:35][N:36]5[CH2:37][CH2:38][O:39][CH2:40][CH2:41]5)=[CH:32][C:25]=3[S:24]4)=[CH:19][CH:20]=2)=[O:13])[CH:7]=1)([CH3:1])[C:3]([OH:46])=[O:4]
ParticipantsProcedureWorkupSources & evidenceReaction notes

Participants

6

Reactant 4

HCID 6386tert-ButanolHCID 105532-Methyl-2-buteneHCID 23668197Sodium ChloriteHCID 462144741-[5-(1,1-Dimethyl-2-oxo-ethyl)-isoxazol-3-yl]-3-{4-[7-(2-morpholin-4-yl-ethoxy)-benzo[d]imidazo[2,1-b]thiazol-2-yl]-phenyl}-urea

Product 1

HCID 462144722-Methyl-2-[3-(3-{4-[7-(2-morpholin-4-yl-ethoxy)-benzo[d]imidazo[2,1-b]thiazol-2-yl]-phenyl}-ureido)-isoxazol-5-yl]-propionic acid

Reagents, catalysts & solvents 1

HCID 962WaterSolvent

Procedure

2-Methyl-2-[3-(3-{4-[7-(2-morpholin-4-yl-ethoxy)-benzo[d]imidazo[2,1-b]thiazol-2-yl]-phenyl}-ureido)-isoxazol-5-yl]-propionic acid (I-5) is prepared by following a general procedure given in J. Org. Chem. 2002, 67, 411. To a stirred solution of 1-[5-(1,1-dimethyl-2-oxo-ethyl)-isoxazol-3-yl]-3-{4-[7-(2-morpholin-4-yl-ethoxy)-benzo[d]imidazo[2,1-b]thiazol-2-yl]-phenyl}-urea (I-4a) (1 equivalent) in a 5:1 mixture of tert-butanol and water at rt are added sequentially dihydrogen sodium phosphate (3 equivalents), 2-methyl-2-butene (6 equivalents), and sodium chlorite (1 to 1.5 equivalents) and the mixture is stirred at rt until the reaction is substantially complete as monitored by LCMS or TLC. The mixture is concentrated under reduced pressure and the residue is partitioned between water and either dichloromethane or a mixture of isopropanol and dichloromethane. The separated aqueous layer is further extracted with dichloromethane or a mixture of isopropanol and dichloromethane. The combined organic layers are washed with water or brine, dried over magnesium sulfate, filtered, and concentrated under reduced pressure. The residue is purified by preparative reverse-phase HPLC or silica gel flash chromatography to afford 2-methyl-2-[3-(3-{4-[7-(2-morpholin-4-yl-ethoxy)-benzo[d]imidazo[2,1-b]thiazol-2-yl]-phenyl}-ureido)-isoxazol-5-yl]-propionic acid (I-5).

Workup

  1. custom2-Methyl-2-[3-(3-{4-[7-(2-morpholin-4-yl-ethoxy)-benzo[d]imidazo[2,1-b]thiazol-2-yl]-phenyl}-ureido)-isoxazol-5-yl]-propionic acid (I-5) is prepared
  2. concentrationThe mixture is concentrated under reduced pressure
  3. customthe residue is partitioned between water
  4. additioneither dichloromethane or a mixture of isopropanol and dichloromethane
  5. extractionThe separated aqueous layer is further extracted with dichloromethane
  6. additiona mixture of isopropanol and dichloromethane
  7. washThe combined organic layers are washed with water or brine
  8. dry with materialdried over magnesium sulfate
  9. filtrationfiltered
  10. concentrationconcentrated under reduced pressure
  11. customThe residue is purified by preparative reverse-phase HPLC or silica gel flash chromatography

Sources & evidence

ORD record
ord-3ba8537abd3a4f8abde2cc8107cb4777
Source dataset
uspto-grants-2013_10
DOI
10.6084/m9.figshare.5104873.v1
Patent number
US08551963B2

Reaction notes

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