Synthesis of amino acid, N-carboxyanhydrides

Details Synthesis of amino acid, N-carboxyanhydrides Synthesis of amino acid, N-carboxyanhydrides

2007-11-13

2007-11-13

Saeed, Kamal A. (Department: 1626)

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C548S229000, C562S888000

Reexamination Certificate

active

11259672

ABSTRACT:
A process for producing N-carboxyanhydrides is disclosed. The process produces N-carboxyanhydrides as a product and HCl as a by-product. The HCl by-product is purged from the reaction mixture by passing a purge gas through the reaction mixture as a carbonylation reagent is reacting with an amino acid or a salt thereof. The N-carboxyanhydrides produced by this process have a relatively lower chloride impurity content, relatively higher yields can be achieved, and the N-carboxyanhydrides can be produced on a larger scale.

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