Stabilized activated derivatives of carbamic acid, their...

Details Stabilized activated derivatives of carbamic acid, their... Stabilized activated derivatives of carbamic acid, their...

2006-06-13

2006-06-13

Kifle, Bruck (Department: 1624)

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C548S542000

Reexamination Certificate

active

07060845

ABSTRACT:
Process for the preparation of stable activated derivatives of carbamic acid, comprising at least one protected amino group and an activated carbamic acid function, from an amino acid derivative in which the amino group is protected. The process includes: a) a step of transformation of the —COOH group of the amino acid derivative into a —CON3group to obtain an acyl azide; b) a step of transformation of the —CON3group of the acyl azide into a —NCO group to obtain an isocyanate; c) a step of treating the isocyanate to obtain a stable derivative of carbamic acid.

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