描述了顺式和反式-4-苄基和4-(3-甲氧基苄基)-2-甲氧基羰基-1-甲基哌啶的合成;参见下文。从这些化合物获得的氨基酸和氨基醇无法环化。已制备出顺式-2-苄基-4-乙氧基羰基-1-甲基哌啶,其氨基酸盐酸盐在160°C的多磷酸中环化,得到2,4,5,6,7-六氢-3-甲基-2, 6-methano-1 H -3-benzazonin-7-将其转化为几种衍生物。水解并环化通过两种途径获得的4-苄基-4-乙氧基羰基-1-甲基哌啶,得到N-甲基螺并[茚满-2,4'-哌啶] -1-酮,其也被转化为几种衍生物。
The present invention is directed to novel compounds, to a process for their preparation, their use in therapy and pharmaceutical compositions comprising the novel compounds.
本发明涉及新化合物,以及用于它们的制备方法,它们在治疗中的应用以及包含这些新化合物的药物组合物。
Synthese des N-Methyl-piperidin-4,4-dicarbonsäure-diäthylesters
作者:J. Schmutz、F. Künzle、R. Hirt
DOI:10.1002/hlca.19540370621
日期:——
Es wird die Synthesedes N-Methyl-piperidin-4,4-dicarbonsäure-diäthylesters (VII) über das N-Methyl-N-benzyl-piperidinium-4,4-dicarbonsäure-diäthylester-bromid (V) beschrieben. Der Diäthylester VII liess sich in den N-Methyl-piperidin-4-carbonsäure-äthylester (IX) überführen.
作者:Lihua Luo、Juan Tang、Rui Sun、Wenjing Li、Xueli Zheng、Maoling Yuan、Ruixiang Li、Hua Chen、Haiyan Fu
DOI:10.1021/acs.orglett.2c00725
日期:2022.4.22
A direct pyridinium C–H sulfonylimination has been developed for the synthesis of sulfonyl iminopyridine derivatives with high efficiency. This transformation features the direct and efficient formation of a C═N bond with a high functional group tolerance under metal-free conditions. The spectroscopic properties potentially enable these sulfonyl iminopyridine compounds to be useful new emitting materials