Synthesis of Pharmacologically Relevant Indoles with Amine Side Chains via Tandem Hydroformylation/Fischer Indole Synthesis
摘要:
The sequence of hydroformylation and Fischer indole synthesis starting from amino olefins and aryl hydrazines is described. In a convergent manner, the two units bearing pharmacologically relevant substituents are assembled in the final indolization step. This modular and diversity-oriented approach to tryptamines and homotryptamines can be conducted in water and allows synthesis of branched and nonbranched tryptamines as well as tryptamine-based pharmaceuticals such as the 5-HT1D agonist L 775 606.
obtained trifluoroacetimidates were more stable than the trichloro analogue and were easily purified by SiO2 column chromatography and/or distillation. The 3,3-sigmatropic rearrangement of allylic analogues, acid-catalyzed cyclization of the epoxy analogues and glycosylation of sugar analogues were studied comparing with their corresponding trichloroacetimidates. The trifluoroacetimidates were considerably
Palladium-Catalyzed [1,3]-O-to-N Rearrangement of Allylic Imidates
作者:Yusuke Kuroda
DOI:10.1055/s-0041-1737140
日期:2022.1
The rearrangement of allylic imidates is a powerful transformation for the synthesis of allylic amines. Whereas the [3,3]-rearrangement has long been established as the Overman rearrangement, the corresponding [1,3]-rearrangement is rare. Here, we report a novel strategy for the [1,3]-rearrangement of imidates based on the oxidative addition of a palladium(0) catalyst to an allylic imidate. Structurally
PtCl 2 , PtCl 4 , AuCl, and AuCI, were found to be efficient catalysts for the Overman rearrangement of O-allyltrichloroacetimidates to N-allyltrichloroacetamides.
[EN] NEW CHIRAL STATIONARY PHASES FOR CHROMATOGRAPHY BASED ON AROMATIC ALLYL AMINES<br/>[FR] NOUVELLES PHASES STATIONNAIRES CHIRALES POUR CHROMATOGRAPHIE À BASE D'AMINES D'ALLYLE AROMATIQUES
申请人:RUDJER BOSKOVIC INST
公开号:WO2009109792A1
公开(公告)日:2009-09-11
New chiral stationary phases (CSPs) based on chiral selectors covalently bound on a solid support were prepared. Chiral selectors were obtained from enantiomerically pure aromatic amines and 3,5-dinitrobenzoic acid and then linked to the support surface through the allylic double bond. Such obtained materials allow enantioseparation of racemates or enantiomerically enriched compounds. These chiral stationary phases can be used as fillings in chromatographic columns for enantiomer separation of naproxen type drugs and other similar non-steroidal anti-inflammatory drugs (NSAID) by means of high performance liquid chromatography on both the analytical and preparative scale.
Dialkylation of Indoles with Trichloroacetimidates to Access 3,3-Disubstituted Indolenines
作者:Tamie Suzuki、Nilamber A. Mate、Arijit A. Adhikari、John D. Chisholm
DOI:10.3390/molecules24224143
日期:——
2-Substituted indoles may be directly transformed to 3,3-dialkyl indolenines with trichloroacetimidate electrophiles and the Lewis acid TMSOTf. These reactions provide rapid access to complex indolenines which are present in a variety of complex natural products and medicinally relevant small molecule structures. This method provides an alternative to the use of transition metal catalysis. The indolenines