Process for the preparation of lysergic acid esters

Details Process for the preparation of lysergic acid esters Process for the preparation of lysergic acid esters

1983-05-26

1985-06-18

Daus, Donald G.

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C07D45704, C07D45706

Patent

active

045242089

ABSTRACT:
A process for preparing lysergic acid esters of the formula ##STR1## wherein R is alkyl of up to 3 carbon atoms, comprises reacting corresponding lysergic acid or isolysergic acid amides with corresponding alcohols at temperatures of 0.degree. to 65.degree. C. for 2 to 30 hours in the presence of an acid at a pH value of 0-1.

REFERENCES:
Berde and Schild, Ergot Alkaloids and Related Compounds, Springer-Verlag, New York, (1978), pp. 44, 45.
March, Jerry, Advanced Organic Chemistry, McGraw-Hill, New York, (1977), pp. 353-355, 367.
Noller, Carl, Textbook of Organic Chemistry, W. B. Saunders, Philadelphia, (1966), p. 234.
Weygand-Hilgetag, "Organisch-chemische Experimentierkunst", Leipzig 1970, p. 352.
A. Stoll and T. Petrzilka, Helv. Chim. Acta 36: 1125 (1953).

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