The present invention is concerned with novel hydroxy-methyl isoxazole derivatives of formula I
wherein R
1
, R
2
and R
3
are as described herein, as well as pharmaceutically acceptable salts and esters thereof. The active compounds of the present invention have affinity and selectivity for GABA A α5 receptor. Further the present invention is concerned with the manufacture of the active compounds of formula I, pharmaceutical compositions containing them and their use as pharmaceuticals.
本发明涉及一种新型的羟甲基异噁唑衍生物,其化学式为I,其中R1、R2和R3如本文所述,以及其药学上可接受的盐和酯。本发明的活性化合物具有对GABA A α5受体的亲和力和选择性。此外,本发明涉及制备化学式I的活性化合物、含有它们的药物组合物以及它们作为药物的用途。
Enamine chemistry—XXV
作者:S. Carlsson、S.-O. Lawesson
DOI:10.1016/0040-4020(82)80183-x
日期:1982.1
the enaminones 4a–4e by the following two routes: (A): Acylation of the enamines, 2, derived from 1 and secondary amines (pyrrolidine, morpholine and piperidine) by ethyl chloroformate, and (B): Condensation of 1 with diethyl oxalate, giving the β-ketoesters 3, followed by reaction with the secondary amines. Ethyl 2(-1-pyrrolidinyl)-1-cyclopentene-1-carboxylate, 4f, and methyl 3-(1-pyrrolidinyl)-2-butenoate
Reduction of carbonyl compounds using the carbonyl reductase of kluyveromyces marxianus
申请人:Korea Institute of Science and Technology
公开号:US20030139464A1
公开(公告)日:2003-07-24
A compound represented by a genera formula (Ia) or (Ib) and a stereo-selective preparation method thereof using a carbonyl reductase which is separated from
Kluyveromyces marxianus
. The compound can be prepared by reduction of substituted &bgr;-keto ester and can be used as an intermediate in preparing &bgr;-lactam group antibiotics.
1
Novel synthesis and γ-alkylation reactions of 4-(1-pyrrolidinyl)-2(5H)-thiophenones
作者:Yu-Jang Li、Zen-Ting Liu、Sheng-Chuan Yang
DOI:10.1016/s0040-4039(01)01705-1
日期:2001.11
Four-step synthesis of achiral and chiral 4-(1-pyrrolidinyl)-2(5H)-thiophenones with 61 and 66% overall yields are described. The γ-alkylation reaction studies and synthetic applications toward the thiolactomycin analog are also reported.
Condensation of enamines with 4-trimethylsilyl-3-dialkylamino-crotonate esters under acid catalysed conditions gives aromatic compounds according to a 3C+3C or a 4C+2C manner depending on the structure of the enamine.