p-Toluenesulfonic acid → HCID 86735829, compound

Participants

Reaction Steps

1.1 g (2.5 mmoles of 1-[7-[(1,3-dithia-2-cyclopentyl)-ethyl]-3,3-dimethyl-1,5-dioxaspiro[5,4]-dec-8-yl]-trans-1-octene-3-ol were dissolved in 20 ml of absolute ether, 20 mg of p-toluenesulfonic acid were added, 1.2 ml (13 mmoles) of dihydropyrane in 10 ml of absolute ether were added dropwise and the whole was stirred for 4 hours at room temperature. 0.2 ml of dihydropyrane was again added. The reaction mixture was allowed to stand overnight and was then stirred for 30 minutes with 0.5 g of solid Na2CO3. The suspension was filtered, the filtrate was concentrated under reduced pressure and the oil that had formed was eluted with cyclohexane-ethyl acetate (9:1) over a silica gel column.

Provenance & Evidence