[EN] PROCESS FOR THE PREPARATION OF SUBSTITUTED CYCLOSERINES<br/>[FR] PROCÉDÉ DE PRÉPARATION DE CYCLOSÉRINES SUBSTITUÉES
申请人:SYNGENTA PARTICIPATIONS AG
公开号:WO2015166094A1
公开(公告)日:2015-11-05
The present invention relates to processes for the preparation of substituted cycloserine compounds of formula (I) wherein R1 is C1-C8alkyl, C1-C8haloalkyl, C3-C6cycloalkyl,aryl or aryl substituted by one to five R11, or aryl-C1-C4alkylene or aryl-C1-C4alkylene substituted by one to five R11; and each R11 is independently C1-C4alkyl, C1-C4haloalkyl, C1-C4alkoxy, C1-C4haloalkoxy, cyano or halogen; The invention also relates to intermediates produced by the processes. Compounds of formula (I) are useful intermediates for the production of compounds in the agricultural and pharmaceutical fields.
Diastereoselective [3+2] cycloaddition of allyltrialkylsilanes to intermediate N-acyliminoesters obtained from methyl-4-methoxy-2-imidazolidinone- and 2-oxazolidinone-4-carboxylates
作者:Annette Stahl、Eberhard Steckhan、Martin Nieger
DOI:10.1016/0040-4039(94)85317-7
日期:1994.10
using allylsilanes as nucleophiles in the presence of TiCl4 affords three carbon ring annulation products 5 and 9 via a [3+2] cycloaddition. Besides that, the simple methoxy group substitution product is formed. The ring annulation occurs with practically total diastereoselectivity so that all substituents are located on the β-side of the bicyclic product.
[EN] OXAZOLIDIN-2-ONE AND THIAZOLIDIN-2-ONE DERIVATIVES FOR USE AS EP4 RECEPTOR AGONISTS IN THE TREATMENT OF GLAUCOMA<br/>[FR] DERIVES DE L'OXAZOLIDIN-2-ONE ET DE LA THIAZOLIDIN-2-ONE ANTAGONISTES DU RECEPTEUR EP4, POUR LE TRAITEMENT DU GLAUCOME
申请人:MERCK FROSST CANADA INC
公开号:WO2004019938A1
公开(公告)日:2004-03-11
This invention relates to compounds of formula (I) which are potent selective agonists of the EP4 subtype of prostaglandin E2 receptors, their use or a formulation thereof in the treatment of glaucoma and other conditions which are related to elevated intraocular pressure in the eye of a patient.
(PTSA or HCl) for the amidation of methyl-pyroglutamate derivatives was investigated. In this study of the synthesis of P2X7 receptor (P2X7R) antagonists, ZrCl4 was the best catalyst for the synthesis of pyroglutamides substituted in position 1. Four new pyroglutamides have shown good antagonistic properties on the human P2X7 receptor (h-P2X7R).