Organic compounds -- part of the class 532-570 series – Organic compounds – Oxygen containing
Reexamination Certificate
2005-11-29
2005-11-29
Keys, Rosalynd (Department: 1621)
Organic compounds -- part of the class 532-570 series
Organic compounds
Oxygen containing
C568S322000, C568S648000
Reexamination Certificate
active
06969778
ABSTRACT:
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, α-asarone, 2,4,5-trimethoxy-phenyl propionone from β-asarone or β-asarone richAcorus calamusoil containing α and γ-asarone by hydrogenating and dimerizing by treatment with DDQ in presence of an organic acid.
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Shosuke Yamamura et al.,
Acharya Ruchi
Joshi Bhupendra Prasad
Sinha Arun Kumar
Council of Scientific & Industrial Research
Keys Rosalynd
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