5H-2-Pyrindines From 2-Bromocyclopentene-1-carboxaldehyde
作者:Thomas L. Gilchrist、Paul D. Kemmitt、Andrew L. Germain
DOI:10.1016/0040-4020(95)00509-7
日期:1995.8
The palladium(0) catalysed coupling of 2-bromocyclopentene-1-carboxaldehyde N,N-dimethylhydrazone 1 with vinylzinc halides and with 2-furyl- and 2-thicnylzinc halides provides a route to the corresponding 2-vinyl- and 2-heteroaryl-cyclopentene-1-carboxaldehyde dimethylhydrazones. These cyclise thermally to 6,7-dihydro-5H-2-pyrindines (e.g., 3).
2-溴环戊烯-1-甲醛N,N-二甲基hydr 1与乙烯基锌卤化物以及2-呋喃基和2-噻吩基锌卤化物的钯(0)催化偶联为相应的2-乙烯基-和2-杂芳基-提供了一条途径环戊烯-1-羧甲醛二甲基hydr。它们热环化成6,7-二氢-5 H -2-吡啶啉(例如3)。
Structure–activity relationship study of non-steroidal NPC1L1 ligands identified through cell-based assay using pharmacological chaperone effect as a readout
We previously discovered steroidal NPC1L1 ligands by using a novel cell-based assay that employs pharmacological chaperone effect as a readout. Those steroid derivatives bound to a site different from both the sterol-binding domain and the ezetimibe-binding site, implying that they may be a novel class of NPC1L1 inhibitors with a distinct mode of action. As an extension of that work, we aimed here
Formation of Condensed 1<i>H</i>-Pyrrol-2-ylphosphonates and 1,2-Dihydropyridin-2-ylphosphonates via Kabachnik–Fields Reaction of Acetylenic Aldehydes and Subsequent 5-<i>exo</i>-<i>dig</i> or 6-<i>endo</i>-<i>dig</i> Cyclizations
Kabachnik–Fields reactions of various carbocyclic or heterocyclic acetylenic aldehydes together with subsequent Lewis acid catalyzed cyclizations have been studied. It was found that 5-exo-dig versus 6-endo-dig cyclization mode strongly depends on the structure of starting materials. Thus, nonaromatic acetylenic α-anilinomethylphosphonates underwent gold(III)-catalyzed or iodine-mediated 5-exo-dig
Facile synthesis of 1,2-dione-containing abietane analogues for the generation of human carboxylesterase inhibitors
作者:Randall J. Binder、M. Jason Hatfield、Liying Chi、Philip M. Potter
DOI:10.1016/j.ejmech.2018.02.052
日期:2018.4
the synthesis of such compounds is complex. Here we describe a novel method for the generation of 1,2-dione containing diterpenoids using a unified approach, by which boronic acids are joined to vinyl bromo-cyclohexene derivatives via Suzuki coupling, followed by electrocyclization and oxidation to the o-phenanthroquinones. This has allowed the construction of a panel of miltirone analogues containing