4-Hydroxydodecanoic Acid Lactone

Conversion into 12-hydroxydodecanoic acid. The foregoing lactone is added to a solution of potassium hydroxide (150 g) in methanol (800 ml) and the... [Pg.733]

Consider aliphatic hydrocarbons. A methyl group (CH3) at the end of a long aliphatic chain will show a resonance with a shift of about 0.75 ppm. Figure 4.1 shows the shifts for the resonances of the aliphatic side chain of 5-hydroxydodecanoic acid 5-lactone. The methyl H s (position 12) that are nine bonds removed from the oxygen atom of the carbonyl group are sufficiently well isolated to... [Pg.86]

A methylene (CH2) group in the middle of a long chain of hydrocarbons will generate a H resonance with a chemical shift of aroimd 1.15 ppm. The chemical shifts of the methylene H resonances on carbons 8-11 of 5-hydroxydodecanoic acid 5-lactone are found at 1.15-1.16ppm. [Pg.87]

Synonyms Dodecan-5-olide 5-Hydroxydodecanoic acid, 5-lactone... [Pg.1567]

Classification Nonaromatic lactone Definition Obtained by lactonization of 5-hydroxydodecanoic acid Empirical C12H22O2... [Pg.1567]

Synonyms Dodecanolide-1,4 2(3H)-Furanone, dihydro-5-octyl- 4-Hydroxydodecanoic acid y-lactone y-Octyl-y-butyrolactone y-n-Octyl-y-n-butyrolactone... [Pg.1567]

Lipase CA also polymerized hydrophobic oxyacids efficiently [88]. The DP value was beyond 100 in the polymerization of l6-hydroxyhexadecanoic acid, 12-hydroxydodecanoic acid, or 10-hydroxydecanoic acid under vacuum at high temperature (90 °C) for 24 h, whereas a polyester with a lower molecular weight was formed from 6-hydroxyhexanoic acid under similar reaction conditions. This difference may be due to the lipase-substrate interaction. Similar behaviors were reported in the lipase-catalyzed ring-opening polymerization of lactones in different ring sizes [24,25]. [Pg.144]

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