反应详情

Ethylidene bis (16-hydroxyhexadecanoate) (4.38 g, 7.67 mmol) was dissolved in THF (80 ml) and pyridine (0.61 g, 7.71 mmol) was added. 16-hexadecanoyloxyhexadecanoyl chloride (4.18 g, 7.90 mmol) was dissolved in THF (20 ml) and added dropwise. After 3 days at room temperature the mixture was filtered and the filtrate was left at -20° C. for 2 hours. The precipitated product was filtered and purified by flash chromatography (silicagel, chloroform) to give 2.4 g (29%) of the title compound. 1H NMR (300 MHz, CDCl3): δ0.85 (t, 3H, CH3), 1.2-1.4 (s, 90H, --CH2 --), 1.45 (d, 3H, --O--CH(CH3)--O--), 1.5-1.7 (m, 14H, --CH2 --), 2.25 (m, 8H, --CH2 --C(O)--O--), 3.60 (t, 2H, --CH2 --OH), 4.05 (t, 4H, --C(O)--O--CH2 --), 6.85 (q, 1H, --O--CH(CH3)--O--). 13C NMR (75 MHz, CDCl3): δ13.7, 19.1, 22.2, 24.2, 24.6, 25.2, 25.5, 28.2, 28.5, 28.7, 28.8, 29.0, 29.2, 31.5, 32.3, 33.7, 34.0, 62.5, 64.0, 88.0, 171.5, 173.5.

1. additionadded dropwise
2. filtrationAfter 3 days at room temperature the mixture was filtered
3. filtrationThe precipitated product was filtered
4. custompurified by flash chromatography (silicagel, chloroform)