Triphenylphosphine → HCID 59226469, compound

HRID 2192587Notes

Reaction equation

HRID 2192587 reaction equation
[Si:1]([O:8][C@@H:9]([C@H:14]1[CH2:18][O:17][C:16]([CH3:20])([CH3:19])[O:15]1)[C@@H:10]([CH3:13])[CH2:11]O)([C:4]([CH3:7])([CH3:6])[CH3:5])([CH3:3])[CH3:2].CC(OC(/N=N/C(OC(C)C)=O)=O)C.C1C=CC(P(C2C=CC=CC=2)C2C=CC=CC=2)=CC=1.C1C=CC(P([N:68]=[N+:69]=[N-:70])(C2C=CC=CC=2)=O)=CC=1>C1COCC1>[N:68]([CH2:11][C@H:10]([CH3:13])[C@H:9]([C@H:14]1[CH2:18][O:17][C:16]([CH3:20])([CH3:19])[O:15]1)[O:8][Si:1]([C:4]([CH3:7])([CH3:6])[CH3:5])([CH3:3])[CH3:2])=[N+:69]=[N-:70]

Participants

6

Reactant 4

HCID 11776TriphenylphosphineHCID 199401P,P-Diphenylphosphinic azideHCID 5363146Diisopropyl azodicarboxylateHCID 59226561HCID 59226561, compound

Product 1

HCID 59226469HCID 59226469, compoundYield 62%

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent

Procedure

To a solution of (2S,3R)-3-(tert-butyldimethylsilyloxy)-3-((R)-2,2-dimethyl-1,3-dioxolan-4-yl)-2-methylpropan-1-ol (1.0 equiv.), DIAD (2.0 equiv.), and PPh3 (2.0 equiv.) in THF (0.18 M) was added DPPA (1.0 equiv., 1M solution in THF). The reaction mixture was stirred at room temperature overnight. Upon removal of the volatiles under vacuo, the residue was purified by silica gel column chromatography (2-3-5% EtOAc/n-heptanes) yielding ((1R,2S)-3-azido-1-((R)-2,2-dimethyl-1,3-dioxolan-4-yl)-2-methylpropoxy)(tert-butyl)dimethylsilane (62%). 1H-NMR (400 MHz, CDCl3): δ 4.04-4.10 (m, 1H), 3.94 (dd, J=8.0, 6.4, 1H), 3.72 (d, J=7.2, 11H), 3.53 (t, J=8.0, 11H), 3.36 (dd, J=12, 8.0, 1H), 3.19 (dd, J=12.0, 6.7, 1H), 1.52-1.60 (m, 1H), 1.41 (s, 3H), 1.34 (s, 3H), 0.92 (d, J=7.2, 3H), 0.90 (s, 9H), 0.12 (s, 3H), 0.09 (s, 3H).

Workup

  1. customUpon removal of the volatiles under vacuo
  2. customthe residue was purified by silica gel column chromatography (2-3-5% EtOAc/n-heptanes)

Sources & evidence

ORD record
ord-14496afb3bff42a1aa079ae86649bada
Source dataset
uspto-grants-2012_12
Patent number
US08329732B2

Reaction notes

Loading…