Pyridine → (2RS,3E,6R)-6,10-dimethyl-3,9-undecadien-2-ol acetate

Beteiligte Stoffe

Reaktionsbedingungen

Reaktionsschritte

A flame-dried, 250 mL, three-necked flask containing a magnetic stirring bar was charged under argon with 7.9 g (8.1 mL, 0.10 mol) of dry pyridine. After cooling in an ice-bath, 10.2 g (9.4 mL, 0.10 mol) of acetic anhydride and then 10.0 g (0.051 mol) of (2RS,3E,6R)-6,10-dimethyl-3,9-undecadien-2-ol were added dropwise, and the reaction was stirred for 2 hours at 0° C. and then overnight at 20° C.. The reaction mixture was poured onto 2N HCl/ice and extracted with 2×200 mL of ether. The combined extracts were washed with 2N HCl, sat. NaHCO3 solution, and brine, dried over Na2SO4, filtered and evaporated. Kugelrohr distillation at ca. 105°-130° C./0.1 mmHg afforded 12.05 g (99%) of (2RS,3E,6R)-6,10-dimethyl-3,9-undecadien-2-ol acetate as colorless liquid. Calcd. for C15H26O 2 (238.4): C, 75.58; H, 10.99; Found: C, 75.47; H, 11.04%. [α]D25 =2.16° (2.04% in CHCl3).

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