Process for preparation of erythromycin compounds

Details Process for preparation of erythromycin compounds Process for preparation of erythromycin compounds

2005-06-14

2005-06-14

Wilson, James O. (Department: 1623)

Drug, bio-affecting and body treating compositions

Designated organic active ingredient containing

Carbohydrate doai

C514S025000, C536S007200, C536S004100, C536S018500

Reexamination Certificate

active

06906039

ABSTRACT:
The present invention is to provide a process for producing a 2′-O-acetyl-4″-O-formyl-8,9-anhydroerythromycin A 6,9-hemiketal compound4, and it provide a process for producing an erythromycin compound which comprises reacting a formylating agent with a 2′-O-acetylerythromycin A compound2to obtain 2′-O-acetyl-4″-O-formylerythromycin A compound3, then, acting an acid on Compound3to subject to hemiketalation, and then adding an aqueous basic solution in an aqueous solution to precipitate Compound4as free crystals.

REFERENCES:
patent: 5959088 (1999-09-01), Miura et al.
patent: 0 643 068 (1995-03-01), None
patent: 0 846 697 (1998-06-01), None
patent: 846697 (1998-06-01), None
patent: WO 94/10185 (1994-05-01), None
New Current, vol. 7, No. 13, pp. 19-21 (Jun. 10, 1996).

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