Methylenecyclobutane → HCID 57515834, compound

HRID 473346

Reaction equation

[Si:1]([O:8][C@@H:9]([C@@H:12]([NH:16][C:17](=[O:23])[O:18][C:19]([CH3:22])([CH3:21])[CH3:20])[CH2:13][CH:14]=[CH2:15])[CH2:10][OH:11])([C:4]([CH3:7])([CH3:6])[CH3:5])([CH3:3])[CH3:2].[CH2:24]=[C:25]1CC[CH2:26]1>Cl[Ru](=C1N(C2C(C)=CC(C)=CC=2C)CCN1C1C(C)=CC(C)=CC=1C)(Cl)(=CC1C=CC=CC=1)[P](C1CCCCC1)(C1CCCCC1)C1CCCCC1.ClCCCl.CCOC(C)=O>[Si:1]([O:8][C@@H:9]([C@@H:12]([NH:16][C:17](=[O:23])[O:18][C:19]([CH3:22])([CH3:21])[CH3:20])[CH2:13][CH:14]=[C:15]1[CH2:26][CH2:25][CH2:24]1)[CH2:10][OH:11])([C:4]([CH3:7])([CH3:5])[CH3:6])([CH3:3])[CH3:2]

Participants

Conditions

Temperature: 80 °C

Procedure

A solution of tert-butyl (2S,3S)-2-(tert-butyldimethylsilyloxy)-1-hydroxyhex-5-en-3-ylcarbamate (1.0 g, 2.9 mmol) and Grubbs Catalyst 2nd generation (0.12 g, 0.14 mmol) in DCE (6 mL) was treated with methylenecyclobutane (0.79 g, 12 mmol) and heated to 80° C. in a sealed vial overnight. The reaction mixture was diluted with EtOAc, washed with saturated NaHCO3 solution, and brine. The organics were dried over MgSO4 and concentrated under reduced pressure. Purification of the crude residue by column chromatography gave tert-butyl (2S,3S)-2-(tert-butyldimethylsilyloxy)-5-cyclobutylidene-1-hydroxypentan-3-ylcarbamate (0.900 g, 81% yield) as a 2:1 mixture with starting alkene.

Workup

washwashed with saturated NaHCO3 solution, and brine
dry with materialThe organics were dried over MgSO4
concentrationconcentrated under reduced pressure
customPurification of the crude residue by column chromatography

Sources & evidence

ORD record: ord-589e8bbd79c24becaf055c15e40106ee
Source dataset: uspto-grants-2014_01
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08633315B2

Linked notes

Loading…