Process for the preparation of activated polyethylene glycols

Details Process for the preparation of activated polyethylene glycols Process for the preparation of activated polyethylene glycols

2006-10-24

2006-10-24

Saeed, Kamal A. (Department: 1626)

Drug, bio-affecting and body treating compositions

Preparations characterized by special physical form

C528S196000, C528S198000

Reexamination Certificate

active

07125558

ABSTRACT:
The present invention relates to a process for the preparation of activated polyethylene glycols, or PEG(NPC)2s, comprising reacting polyethylene glycol with an activator while in the presence of an aromatic nitrogen containing heterocyclic base. The process is carried out at temperatures ranging from about 20 to about 30° C., more preferably at room temperature, and under stoichiometric conditions.

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