Triphenylphosphine → HCID 58204937, compound

HRID 886432Notes

Reaction equation

HRID 886432 reaction equation
[CH:1]([N:4]1[C:8]([C:9]2[N:18]=[C:17]3[N:11]([CH2:12][CH2:13][O:14][C:15]4[CH:22]=[C:21]([OH:23])[N:20]=[CH:19][C:16]=43)[CH:10]=2)=[N:7][CH:6]=[N:5]1)([CH3:3])[CH3:2].[C:24]([O:29][C:30]([CH3:33])([CH3:32])[CH3:31])(=[O:28])[C@@H:25]([CH3:27])O.CC(OC(/N=N/C(OC(C)C)=O)=O)C.C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1>C1COCC1.C(Cl)Cl.CO>[C:30]([O:29][C:24](=[O:28])[C@@H:25]([O:23][C:21]1[N:20]=[CH:19][C:16]2[C:17]3[N:11]([CH2:12][CH2:13][O:14][C:15]=2[CH:22]=1)[CH:10]=[C:9]([C:8]1[N:4]([CH:1]([CH3:3])[CH3:2])[N:5]=[CH:6][N:7]=1)[N:18]=3)[CH3:27])([CH3:33])([CH3:32])[CH3:31]

Participants

8

Reactant 4

HCID 11776TriphenylphosphineHCID 5363146Diisopropyl azodicarboxylateHCID 10953655tert-butyl (2R)-2-hydroxypropanoateHCID 1360309132-(2-Isopropyl-2H-[1,2,4]triazol-3-yl)-4,5-dihydro-6-oxa-1,3a,9-triaza-benzo[e]azulen-8-ol

Product 1

HCID 58204937HCID 58204937, compound

Reagents, catalysts & solvents 3

HCID 887MethanolSolventHCID 6344DichloromethaneSolventHCID 8028TetrahydrofuranSolvent

Procedure

2-(2-isopropyl-2H-[1,2,4]triazol-3-yl)-4,5-dihydro-6-oxa-1,3a,9-triaza-benzo[e]azulen-8-ol from Example 93, (+)-tert-butyl d-lactate, diisopropylazodicarboxylate (DIAD), and triphenylphosphine were reacted in THF. The crude product was subjected to flash chromatography (SiO2, gradient 0-5% methanol in DCM) to give (S)-2-[2-(2-Isopropyl-2H-[1,2,4]triazol-3-yl)-4,5-dihydro-6-oxa-1,3a,9-triaza-benzo[e]azulen-8-yloxy]-propionic acid tert-butyl ester as a yellow oil contaminated with triphenylphosphine oxide, no further purification was undertaken (206 mg, 49% based on NMR quantification of PPh3O). LCMS: RT=3.74 min, [M+H]+=441

Sources & evidence

ORD record
ord-8147dd3000b94e72b2851862865477f6
Source dataset
uspto-grants-2012_08
Patent number
US08242104B2

Reaction notes

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