NOVEL METHOD FOR SYNTHESIS OF 1,4-MORPHOLINE-2,5-DIONES
申请人:Bourissou Didier
公开号:US20100036120A1
公开(公告)日:2010-02-11
The invention concerns a novel method for synthesis of 1,4-morpholine-2,5-diones of formula (I), wherein: R, R
1
, R
2
, R
3
and R
4
independently represent various radicals, by oxidizing the ketone function of a cyclic compound of formula (II).
A Short Preparation of an AdvancedIntermediate for Lactacystin Synthesis: The Complete Carbon Skeletonof Clasto-Lactacystin Dihydroxyacid
作者:Philip C. Page、David C. Leach、Colin M. Hayman、A. Sazali Hamzah、Steven M. Allin、Vickie McKee
DOI:10.1055/s-2003-39290
日期:——
An advanced intermediate 22 for lactacystin synthesis, containing the full carbon skeleton of the pyrrolidinone component, has been achieved in four steps from a protected glycine ester.
Short and Versatile Route to a Key Intermediate for Lactacystin Synthesis
作者:Philip C. Bulman Page、A. Sazali Hamzah、David C. Leach、Steven M. Allin、David M. Andrews、Gerasimos A. Rassias
DOI:10.1021/ol027387q
日期:2003.2.1
[reaction: see text] A key intermediate 14 for the synthesis of lactacystin 1 has been constructed in four steps and 33% overall yield. The key steps involve cyclization of a suitably functionalized glutamic acid derivative and concomitant alkylation of the resulting beta,beta-diketoester system, C-acylation of the cyclic alpha-amidoketone 9, and decarboxylbenzylation of 12. Alkylation of a related