Title:
PREPARATION OF SULFONYL IMINE COMPOUNDS
Document Type and Number:
WIPO Patent Application WO2001023352
Kind Code:
A8
Abstract:
Disclosed is a process for the oxidation of sulphonamides of formula (I) to N-sulphonyl imines of formula (II) using chromium (IV) dioxide as the oxidant. Also disclosed is a process for the preparation of imines of formula (iii) or combinatorial libraries thereof by removal of the sulphonyl group. In the formulae (I, II, III), R1 and R2 are independently selected from the group consisting of hydrogen and organic radicals not possessing a hydrogen atom in the position beta to the nitrogen atom of the sulphonamide group; and R3 is an organic radical selected from the group consisting of alkyl, substituted alkyl, aryl, and substituted aryl groups, and optionally R1 and R2 can form a ring.
Inventors:
SMITH ERIC MAURICE
Application Number:
PCT/US2000/026645
Publication Date:
May 30, 2002
Filing Date:
September 28, 2000
Export Citation:
Assignee:
DU PONT (US)
International Classes:
C07C303/36; C07C249/02; C07C303/44; C07C311/03; C07C311/09; C07C311/13; C07C311/16; C07C311/17; C07D307/52; C07D311/70; C07D333/22; C07B61/00; C07C311/29; (IPC1-7): C07C303/44; C07C249/02; C07C311/03; C07C311/09; C07C311/16; C07C311/29; C07D307/52; C07D311/70; C07D333/22
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