Epichlorohydrin → HCID 72793829, compound

HRID 2261452Notes

Reaction equation

HRID 2261452 reaction equation
[CH3:1][C:2]1[CH:3]=[C:4]([CH2:10][CH2:11][C:12]([C:14]2[S:21][C:20]([CH3:22])=[C:19]3[C:15]=2[CH2:16][C@H:17]2[C:23]([CH3:25])([CH3:24])[C@H:18]23)=[O:13])[CH:5]=[C:6]([CH3:9])[C:7]=1[OH:8].[CH2:26]([CH:28]1[O:30][CH2:29]1)Cl>C(O)(C)C.[OH-].[Na+].C(OCC)C>[CH3:9][C:6]1[CH:5]=[C:4]([CH2:10][CH2:11][C:12]([C:14]2[S:21][C:20]([CH3:22])=[C:19]3[C:15]=2[CH2:16][C@H:17]2[C:23]([CH3:25])([CH3:24])[C@H:18]23)=[O:13])[CH:3]=[C:2]([CH3:1])[C:7]=1[O:8][CH2:26][CH:28]1[CH2:29][O:30]1

Participants

6

Reactant 2

HCID 7835EpichlorohydrinHCID 59593550HCID 59593550, compound2×

Product 1

HCID 72793829HCID 72793829, compoundYield 74.3%

Reagents, catalysts & solvents 3

HCID 3283Diethyl EtherSolventHCID 3776IsopropanolSolventHCID 14798Sodium HydroxideSolvent

Procedure

A solution of 3-(3,5-dimethyl-4-hydroxy-phenyl)-1-((1aS,5aR)-1,1,2-trimethyl-1,1a,5,5a-tetrahydro-3-thia-cyclopropa[a]pentalen-4-yl)-propan-1-one (2.00 g, 5.64 mmol, Intermediate 10) in isopropanol (20 mL) and 3 N aq. NaOH (12 mL) is treated with epichlorohydrine (2.12 g, 16.92 mmol). The dark red reaction mixture is stirred at rt for 18 h. The mixture is diluted with diethyl ether (250 mL) and washed with sat. aq. NaHCO3 followed by water. The organic layer is dried over MgSO4 and evaporated. The crude product is purified by CC on silica gel eluting with heptane:EA 4:1 to give 3-(3,5-dimethyl-4-oxiranylmethoxy-phenyl)-1-((1aS,5aR)-1,1,2-trimethyl-1,1a,5,5a-tetrahydro-3-thia-cyclopropa[a]pentalen-4-yl)-propan-1-one (1.72 g, mixture of diastereoisomers) as a pale yellow oil; LC-MS: tR=1.16 min, [M+1]+=411.17; 1H NMR (CDCl3): δ 6.85 (s, 2H), 4.04-3.97 (m, 1H), 3.77-3.69 (s, 1H), 3.52-3.44 and 3.38-3.32 (2m, 1H), 3.05-2.84 (m, 6H), 2.79 (d, J=18.8 Hz, 1H), 2.72-2.68 (m, 1H), 2.38 (s, 3H), 2.26 (s, 6H), 1.92-1.86 (m, 2H), 1.11 (s, 3H), 0.71 (s, 3H).

Workup

  1. customThe dark red reaction mixture
  2. washwashed with sat. aq. NaHCO3
  3. dry with materialThe organic layer is dried over MgSO4
  4. customevaporated
  5. customThe crude product is purified by CC on silica gel eluting with heptane:EA 4:1

Sources & evidence

ORD record
ord-aa5221619a1b41b8bdf422363f29361d
Source dataset
uspto-grants-2010_12
Patent number
US07846964B2

Reaction notes

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