Single pot process for the regioselective synthesis of...

Details Single pot process for the regioselective synthesis of... Single pot process for the regioselective synthesis of...

2011-01-18

2011-01-18

Keys, Rosalynd (Department: 1621)

Organic compounds -- part of the class 532-570 series

Organic compounds

Oxygen containing

Reexamination Certificate

active

07872160

ABSTRACT:
The present invention provides a single pot process for the regioselective synthesis of neolignan framework [3(R)-Ethyl-2(S)-methyl-3-(2″,4″,5″-trimethoxyphenyl)-1-(2′,4′,5′-trimethoxyphenyl)propane from toxic β-isomer rich asarone using montmorillonite acidic clay by employing microwave organic reaction enhancement (MORE) chemistry. This may be useful as versatile synthetic protocol for the synthesis of a large number of lignan and neolignan frameworks.

REFERENCES:
patent: 6544390 (2003-04-01), Sinha et al.
patent: 6969778 (2005-11-01), Sinha et al.

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