ABIETIC ACID synthesis

14synthesis methods

Product Name:ABIETIC ACID
CAS Number:514-10-3
Molecular formula:C20H30O2
Molecular Weight:302.45

by distillation of Rosin (from American Turpentine, e. g.) or by treatment with acid to isomenze the natural Levopimaric acid. Purification over the Diamylammonium salt.

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Yield:-

Reaction Conditions:

with hydrogenchloride in water;ethyl acetate for 0.166667 h;Heating / reflux;

Steps:

2 Example 2
After it was ground, 700 g of abietic acid calcium salt was added into 600 of ml acetic ether and 90 ml of concentrated hydrochloric acid, the mixture was heated and refluxed for 10 min.The mixture was filtered after dissolved, allowed to stand still and be crystallized to give 140 g of abietic acid. Mp. 162-166° C., 1HNMR(300 MHz, in CDCl3, J in Hz) δ ppm: 7.430(1H, brs), 5.757(1H, brs), 5.332(1H, brs), 2.213(1H, seq.), 1.186(3H, s), 1.10(3H, d, J=7.2), 1.000(3H, d, J=7.2), 0.803(3H,s).

References:

Zheng, Liangyuan;Zhang, Shiwei;Zheng, Li;Wang, Mingxin;Zhao, Yongli;Lu, Xuezhao US2004/162341, 2004, A1 Location in patent:Page/Page column 5

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127-25-3 Synthesis