Process for preparation of 9.alpha.-chloro-11.beta.-formyloxypre

Details Process for preparation of 9.alpha.-chloro-11.beta.-formyloxypre Process for preparation of 9.alpha.-chloro-11.beta.-formyloxypre

1995-03-16

1997-02-11

Prior, Kimberly J.

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

540 63, 540 69, 540 70, 540114, 540115, 540116, 540118, 540119, 552564, 552565, 552567, 552568, 552569, 552580, 552581, C07J 7500

Patent

active

056022484

ABSTRACT:
Disclosed is a process for producing a compound of the formula: ##STR1## by reacting a compound of the formula: ##STR2## with: (1) a chlorinating reagent selected from an N-chloroimide or an N-chloroamide; (2) an anhydrous strong acid selected from orthophosphoric acid, alkylsulfonic acids, fluoroalkylsulfonic acids or arylsulfonic acids; and (3) anhydrous dimethyl formamide; at a temperature within the range of about -78.degree. to about 0.degree. C., under anhydrous conditions under an inert atmosphere.

REFERENCES:
patent: 4525303 (1985-06-01), Takagaki et al.
Translation of East German DD 268 954 A1 (1989).

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