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。
Novel piperazinyl- and piperidinyl-cyclohexanols of the following formula are useful as anxiolytic agents and have other psychotropic properties ##STR1##
Mercuric acetate cyclization of -(arylmethyl)piperidines; synthesis of indolo [,-g]morphans (tetracyclic ring system of strychnos indole alkaloids) and ,-benzomorphans
3-g]morphans and 7,8-benzomorphans is reported. The key step in these syntheses is the mercuric acetate oxidation of appropriate 2-(4-piperidylmethyl) indoles or 4-benzylpiperidines, respectively. An alternative synthetic entry to 2-(4-piperidylmethyl)indoles, consisting in Wadsworth-Emmons condensation of a suitable 4-piperidone with diethyl 2-oxopropylphosphonate followed by catalytic hydrogenation and
Overcoming Electron-Withdrawing and Product-Inhibition Effects by Organocatalytic Aerobic Oxidation of Alkylpyridines and Related Alkylheteroarenes to Ketones
作者:Hua Wang、Jie Liu、Jian-Ping Qu、Yan-Biao Kang
DOI:10.1021/acs.joc.9b03205
日期:2020.3.6
An organocatalyzed aerobic benzylic C-H oxidation of alkyl and aryl heterocycles has been developed. This transition metal-free method is able to overcome the electron-withdrawing effect as well as product-inhibition effects in heterobenzylic radical oxidation. A variety of ketones bearing N-heterocyclic groups could be prepared under relatively mild conditions with moderate to high yields.
Synthesis of 4-benzylpyridines via Pd-catalyzed CH<sub>3</sub>-arylation of 4-picoline
作者:Jing Wu、Dadian Wang、Xiang Chen、Qingwen Gui、Hua Li、Ze Tan、Genping Huang、Guangwei Wang
DOI:10.1039/c7ob01726j
日期:——
A highly efficient synthesis of 4-benzylpyridines was developed via Pd-catalyzed C(sp3)–H arylation between 4-picoline and aryl halides. It was found that the best yields were achieved with a simple Pd(PPh3)4 catalyst and Cs2CO3 as the base.
3-Alkoxybenzylpiperidine derivatives as melatonergic agents
申请人:BRISTOL-MYERS SQUIBB COMPANY
公开号:EP0718286A1
公开(公告)日:1996-06-26
Novel 3-alkoxybenzylpiperidines of formula (I) have melatonergic properties. They are believed useful in treating depression, jet-lag, work-shift syndrome, sleep disorders, glaucoma, some disorders associated with reproduction, cancer, immune disorders and neuroendocrine disorders.