Triphenylphosphine → HCID 67139930, compound

HRID 1591997Notes

Reaction equation

HRID 1591997 reaction equation
[CH3:1][O:2][C:3]1[CH:17]=[C:16]([O:18][CH3:19])[CH:15]=[CH:14][C:4]=1[CH2:5][N:6]1[C:10](=[O:11])[CH2:9][NH:8][S:7]1(=[O:13])=[O:12].[C:20]([O:24][C:25](=[O:36])[NH:26][CH2:27][C:28]1[CH:33]=[CH:32][C:31]([CH2:34]O)=[CH:30][CH:29]=1)([CH3:23])([CH3:22])[CH3:21].C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.N(C(OCC)=O)=NC(OCC)=O>C1COCC1>[C:20]([O:24][C:25](=[O:36])[NH:26][CH2:27][C:28]1[CH:29]=[CH:30][C:31]([CH2:34][N:8]2[CH2:9][C:10](=[O:11])[N:6]([CH2:5][C:4]3[CH:14]=[CH:15][C:16]([O:18][CH3:19])=[CH:17][C:3]=3[O:2][CH3:1])[S:7]2(=[O:13])=[O:12])=[CH:32][CH:33]=1)([CH3:23])([CH3:22])[CH3:21]

Participants

6

Reactant 4

HCID 11776TriphenylphosphineHCID 220568ethyl N-ethoxycarbonyliminocarbamateHCID 2794813tert-Butyl [4-(hydroxymethyl)benzyl]carbamateHCID 66751042HCID 66751042, compound

Product 1

HCID 67139930HCID 67139930, compound

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent

Procedure

A solution of the title B compound in Example 9, 2-(2,4-dimethoxybenzyl)-1,1-dioxo-1,2,5-thiadiazolidin-3-one (742 mg, 2.59 mmol) and (4-hydroxymethyl-benzyl)-carbamic acid t-butyl ester (738 mg, 3.11 mmol) in THF (15 mL) is treated with triphenylphosphine (1.36 g, 5.18 mmol). The mixture is stirred for 10 min and diethyl azodicarboxylate (902 mg, 5.18 mmol) is added dropwise over 1 min. The mixture is stirred for 72 h. The solvent is evaporated and the residue is chromatographed on silica gel using 1% MeOH/CH2Cl2 as the eluent to afford {4-[5-(2,4-dimethoxy-benzyl)-1,1,4-trioxo-1,2,5-thiadiazolidin-2-ylmethyl]-benzyl}-carbamic acid t-butyl ester as a white solid: [M+NH4]+=523.

Workup

  1. stirringThe mixture is stirred for 72 h
  2. customThe solvent is evaporated
  3. customthe residue is chromatographed on silica gel using 1% MeOH/CH2Cl2 as the eluent

Sources & evidence

ORD record
ord-0a3e20caba514c55824c9adeeaa1e6f3
Source dataset
uspto-grants-2007_11
Patent number
US07291635B2

Reaction notes

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