HCID 57167084, compound → HCID 57266558, compound

Participants

Reaction Steps

A suspension of 6-(7-hydroxyheptyl)-7-(3-phenyl-3-oxoprop-1-enyl)-1,4-dioxaspiro[4,4]nonane [1.0 g; prepared as hereinafter described in Example 9(ii)] in dilute hydrochloric acid (2N; 30 ml.) was stirred at 60°-65° C. for 1 hour. The mixture was extracted with diethyl ether and then the combined ethereal extracts were washed with aqueous sodium bicarbonate solution (10% w/v) and then with water, and then dried over anhydrous magnesium sulphate. The solution was evaporated and the residue was purified by preparative thin layer chromatography on silica gel, using a mixture of diethyl ether, n-hexane and ethyl acetate (2:1:1 by volume) as eluant, to give 7-[5-(3-oxo-3-phenylprop-1-enyl)-2-oxocyclopentyl]heptanol (0.16 g.), in the form of a yellow oil. [Elemental analysis: Found: C, 76.9; H, 8.9%; C21H28O5 requires C, 76.8; H, 8.6%, νmax 990 cm-1, 1620 cm-1, 1665 cm-1, 3400 cm-1. N.M.R. (approximately 10% w/v solution in deuterochloroform): triplet at 3.6δ (J=6 cycles/second), multiplets at 7,85-8.05δ, 7.4-7.65δ, 6.85-7.15δ, 2-2.9δ and 1.1-2.0δ].

Provenance & Evidence