Toluene → 3-t-Butyldiphenylsilyloxy-1-(4-phthalimidomethyl-1,3-thiazol-2-yl)azetidine

HRID 891791Notes

Reaction equation

HRID 891791 reaction equation
[Si:1]([O:18][CH:19]1[CH2:22][N:21]([C:23]2[S:24][CH:25]=[C:26]([CH2:28]O)[N:27]=2)[CH2:20]1)([C:14]([CH3:17])([CH3:16])[CH3:15])([C:8]1[CH:13]=[CH:12][CH:11]=[CH:10][CH:9]=1)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.[C:30]1(=[O:40])[NH:34][C:33](=[O:35])[C:32]2=[CH:36][CH:37]=[CH:38][CH:39]=[C:31]12.C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.N(C(OCC)=O)=NC(OCC)=O.C1(C)C=CC=CC=1>O1CCCC1>[Si:1]([O:18][CH:19]1[CH2:20][N:21]([C:23]2[S:24][CH:25]=[C:26]([CH2:28][N:34]3[C:30](=[O:40])[C:31]4=[CH:39][CH:38]=[CH:37][CH:36]=[C:32]4[C:33]3=[O:35])[N:27]=2)[CH2:22]1)([C:14]([CH3:17])([CH3:16])[CH3:15])([C:8]1[CH:9]=[CH:10][CH:11]=[CH:12][CH:13]=1)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1

Participants

7

Reactant 5

HCID 1140TolueneHCID 6809PhthalimideHCID 11776TriphenylphosphineHCID 220568ethyl N-ethoxycarbonyliminocarbamateHCID 222428843-t-Butyldiphenylsilyloxy-1-(4-hydroxymethyl-1,3-thiazol-2-yl)azetidine

Product 1

HCID 222427393-t-Butyldiphenylsilyloxy-1-(4-phthalimidomethyl-1,3-thiazol-2-yl)azetidineYield 78%

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent

Procedure

To a solution of 3-t-butyldiphenylsilyloxy-1-(4-hydroxymethyl-1,3-thiazol-2-yl)azetidine (1.50 g, 3.53 mmol) (obtained as described in Reference Example 2(2)) in tetrahydrofuran (75 ml) were added phthalimide (519 mg, 5.30 mmol), triphenylphosphine (1.39 g, 5.30 mmol) and 40% diethyl azodicarboxylate in toluene solution (2.03 ml, 5.30 mmol) in an ice bath under an atmosphere of nitrogen. The mixture was stirred in an ice bath for 2 hours. After checking the completion of the reaction, the mixture was partitioned between ethyl acetate and saturated aqueous sodium chloride solution. The organic layer was dried over anhydrous sodium sulfate, filtered and concentrated under reduced pressure. The residue was purified by chromatography on a silica gel column using hexane:ethyl acetate (1:5) as the eluant to afford 3-t-butyldiphenylsilyloxy-1-(4-phthalimidomethyl-1,3-thiazol-2-yl)azetidine (1.52 mg, yield 78%) as pale yellow oil.

Workup

  1. customthe completion of the reaction
  2. customthe mixture was partitioned between ethyl acetate and saturated aqueous sodium chloride solution
  3. dry with materialThe organic layer was dried over anhydrous sodium sulfate
  4. filtrationfiltered
  5. concentrationconcentrated under reduced pressure
  6. customThe residue was purified by chromatography on a silica gel column

Sources & evidence

ORD record
ord-0e7d1be1bc5647b482c2e5eea0239ddb
Source dataset
uspto-grants-2006_02
Patent number
US07001897B2

Reaction notes

Loading…