EP 1056727 A1 20001206 - SOLID SUPPORT SYNTHESIS OF 2-OXOPIPERAZINES
Title (en)
SOLID SUPPORT SYNTHESIS OF 2-OXOPIPERAZINES
Title (de)
FESTSTÜTZE SYNTHESE VON 2-OXOPIPERAZINEN
Title (fr)
SYNTHESE DE 2-OXOPIPERAZINES SUR SUPPORT SOLIDE
Publication
Application
Priority
- US 9902734 W 19990208
- US 7613098 P 19980227
Abstract (en)
[origin: WO9943662A1] The subject invention involves processes for making 2-oxopiperazine and homologous compounds using a solid support resin by (a) removing the protecting group from an N-protected amino acid ester of the resin (if present), (b) reacting the resulting unprotected resin ester with a N-protected alpha -amino aldehyde, (c) optionally modifying the resulting intermediate by substituting a non-hydrogen moiety on the N from the amino acid, (d) removing the remaining N-protecting group from the N from the amino aldehyde, and (e) cleaving/cyclizing the product from the resin.
IPC 1-7
IPC 8 full level
C07D 241/08 (2006.01); C07D 243/08 (2006.01); C07D 245/02 (2006.01)
CPC (source: EP)
C07D 241/08 (2013.01); C07D 243/08 (2013.01); Y02P 20/55 (2015.11)
Citation (search report)
See references of WO 9943662A1
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU NL PT SE
DOCDB simple family (publication)
WO 9943662 A1 19990902; AU 2593999 A 19990915; CA 2321302 A1 19990902; EP 1056727 A1 20001206; IL 137918 A0 20011031; JP 2002504545 A 20020212; NO 20004278 D0 20000825; NO 20004278 L 20000825
DOCDB simple family (application)
US 9902734 W 19990208; AU 2593999 A 19990208; CA 2321302 A 19990208; EP 99905883 A 19990208; IL 13791899 A 19990208; JP 2000533419 A 19990208; NO 20004278 A 20000825