Organic compounds -- part of the class 532-570 series – Organic compounds – Oxygen containing
Patent
1989-06-13
1990-09-11
Lone, Werren B.
Organic compounds -- part of the class 532-570 series
Organic compounds
Oxygen containing
568715, 568716, 568717, 568763, 568808, 568813, C07C 39205, C07C 3921, C07C 3328
Patent
active
049565028
ABSTRACT:
A process for preparing a compound of the formula ##STR1## in which both Rs and H or OH; comprising the steps a. of treating the ethyl ester of caffeic acid with trialkylsilyl chloride at ambient conditions in equimolar proportions in the presence of a base;
REFERENCES:
patent: 4644085 (1987-02-01), Drewes et al.
Drews Siegfried
Kundig Hans
Regel Karl H.
Wenteler George L.
Lone Werren B.
Rooperol (N.A.) NV
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