Triphenylphosphine → HCID 140398709, compound

HRID 1419727Notes

Reaction equation

HRID 1419727 reaction equation
[S:1]1[CH:5]=[CH:4][CH:3]=[C:2]1/[C:6](=[N:13]/[OH:14])/[C:7]([O:9][CH2:10][CH:11]=[CH2:12])=[O:8].[CH:15]([O:28][C:29]1[C:30](=[O:37])[CH:31]=[C:32]([CH2:35]O)[O:33][CH:34]=1)([C:22]1[CH:27]=[CH:26][CH:25]=[CH:24][CH:23]=1)[C:16]1[CH:21]=[CH:20][CH:19]=[CH:18][CH:17]=1.C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.N(C(OCC)=O)=NC(OCC)=O>C1COCC1>[S:1]1[CH:5]=[CH:4][CH:3]=[C:2]1/[C:6](=[N:13]/[O:14][CH2:35][C:32]1[O:33][CH:34]=[C:29]([O:28][CH:15]([C:22]2[CH:27]=[CH:26][CH:25]=[CH:24][CH:23]=2)[C:16]2[CH:21]=[CH:20][CH:19]=[CH:18][CH:17]=2)[C:30](=[O:37])[CH:31]=1)/[C:7]([O:9][CH2:10][CH:11]=[CH2:12])=[O:8]

Participants

6

Reactant 4

HCID 11776TriphenylphosphineHCID 220568ethyl N-ethoxycarbonyliminocarbamateHCID 14306387HCID 14306387, compoundHCID 15093893HCID 15093893, compound

Product 1

HCID 140398709HCID 140398709, compoundYield 207.6%

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent

Procedure

To an ice cooled solution of allyl (E)-2-(2-thienyl)-2-(hydroxyimino)acetate (1.0 gm, 4.734 mmol), 5-benzhydryloxy-2-(hydroxymethyl) pyran-4-one (1.46 gm, 4.734 mmol) and triphenylphosphine (1.24 gm, 4.734 mmol) in dry THF (30 ml) under nitrogen was added dropwise diethyl azodicarboxylate (820 μl, 5.208 mmol). The reaction mixture was stirred at room temperature overnight and concentrated under reduced pressure to afford the crude as yellow gum (4.93 gm). The product was purified by silica gel column chromatography using hexane-ethyl acetate (2:1) as eluant to provide the title compound as a gummy foam in 47% yield (1.11 gm).

Workup

  1. concentrationconcentrated under reduced pressure

Sources & evidence

ORD record
ord-7591388962854cca93938c3e132549b9
Source dataset
uspto-grants-1999_03
Patent number
US05888998

Reaction notes

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