| 摘要 |
The present invention relates to neolignan (NEOLASA-I) 3-ethyl-2-methyl-3-(2'',4'',5''-trimethoxy-phenyl-1-(2',4',5'-trimethoxy)phenyl-1-propene and a process for the preparation of high purity, higher yield neolignan, alpha-asarone, 2,4,5-trimethoxy-phenyl propionone from beta-asarone or beta-asarone rich Acorus calamus oil containing alpha and gamma-asarone by hydrogenating and dimerizing by treatment with DDQ in presence of an organic acid.
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