Tetrahydrofuran → HCID 178444476, compound

HRID 1086779Notes

Reaction equation

[H-].[Na+].O1CCCC1.[CH2:8]([C@H:11]1[CH2:16][CH2:15][C@H:14]([OH:17])[CH2:13][CH2:12]1)[CH2:9][CH3:10].[CH2:18]([C@H:23]1[CH2:28][CH2:27][C@H:26](/[CH:29]=[CH:30]/[CH2:31]Br)[CH2:25][CH2:24]1)[CH2:19][CH2:20][CH2:21][CH3:22]>O>[CH2:18]([C@H:23]1[CH2:24][CH2:25][C@H:26](/[CH:29]=[CH:30]/[CH2:31][O:17][C@H:14]2[CH2:15][CH2:16][C@H:11]([CH2:8][CH2:9][CH3:10])[CH2:12][CH2:13]2)[CH2:27][CH2:28]1)[CH2:19][CH2:20][CH2:21][CH3:22]

Participants

Conditions

Temperature: 70 °C

Procedure

A mixture of 0.1 g of sodium hydride and 25 ml of tetrahydrofuran was treated with 0.5 g of trans-4-propylcyclohexanol while gassing with nitrogen, stirred for a further 2 hours, then treated with 1.0 g of (E)-3-(trans-4-pentylcyclohexyl)allyl bromide and subsequently heated to 70° C. overnight. Thereafter, the reaction mixture was treated with 500 ml of water and extracted four times with 50 ml of hexane each time. The combined organic phases were washed twice with 500 ml of water each time, dried over magnesium sulphate, filtered and then concentrated. The residue was purified by chromatography on silica gel with toluene. The trans-4-propylcyclohexyl (E)-3-(trans-4-pentylcyclohexyl)allyl ether obtained was recrystallized from acetone at -25° C.. This gave 1.2 g of pure product with m.p. (C-I) 26° C..

Workup

extractionextracted four times with 50 ml of hexane each time
washThe combined organic phases were washed twice with 500 ml of water each time
dry with materialdried over magnesium sulphate
filtrationfiltered
concentrationconcentrated
customThe residue was purified by chromatography on silica gel with toluene

Sources & evidence

ORD record: ord-5c8405ed712a442bb4ec161ae8917048
Source dataset: uspto-grants-1991_07
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US05032312

Reaction notes

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