2-Substituted Tryptamines: Agents with Selectivity for 5-HT<sub>6</sub> Serotonin Receptors
作者:Richard A. Glennon、Mase Lee、Jagadeesh B. Rangisetty、Malgorzata Dukat、Bryan L. Roth、Jason E. Savage、Ace McBride、Laura Rauser、Sandy Hufeisen、David K. H. Lee
DOI:10.1021/jm990550b
日期:2000.3.1
5-HT(6) serotoninagonists. It was found that 5-HT(6) receptors accommodate small alkyl substituents at the indole 2-position and that the resulting compounds can bind with affinities comparable to that of serotonin. In particular, 2-ethyl-5-methoxy-N, N-dimethyltryptamine (8) binds with high affinity at human 5-HT(6) receptors (K(i) = 16 nM) relative to 5-HT (K(i) = 75 nM) and was a full agonist, at least
Diastereoselective Spirocyclization of<i>C</i>-(Alkyloxycarbonyl)formimines of 2-Substituted 1<i>H</i>Indole-3-ethanamines (= Tryptamines): Basic Studies. 5th Communication on Indoles, Indolenines, and Indolines
C-(Alkoxycarbonyl)formimines of type 15–18 were derived from the 2-substituted tryptamines 2, 9, 10, and 11 and transformed with tosyl chloride into tricyclic 3-spiroindoles of types 19–22 (Scheme 3). The influence of the homochiral alkoxy moieties A–D on the stereochemical outcome of this reaction was studied. Good-to-excellent diastereoselectivities were observed with the (−)-8-(phenylmenth-3-yl)oxy group
Cyclic (Alkyl)(amino)carbene Ligand-Promoted Nitro Deoxygenative Hydroboration with Chromium Catalysis: Scope, Mechanism, and Applications
作者:Lixing Zhao、Chenyang Hu、Xuefeng Cong、Gongda Deng、Liu Leo Liu、Meiming Luo、Xiaoming Zeng
DOI:10.1021/jacs.0c12318
日期:2021.1.27
Transition metal catalysis that utilizes N-heterocycliccarbenes as noninnocent ligands in promoting transformations has not been well studied. We report here a cyclic (alkyl)(amino)carbene (CAAC) ligand-promoted nitro deoxygenative hydroboration with cost-effective chromium catalysis. Using 1 mol % of CAAC-Cr precatalyst, the addition of HBpin to nitro scaffolds leads to deoxygenation, allowing for