A concise method for the synthesis of 2-tetralone by titanium tetrachloride-promoted cyclization of 4-aryl-2-hydroxybutanal diethyl acetal
作者:Yung-Son Hon、Rammohan Devulapally
DOI:10.1016/j.tetlet.2009.07.129
日期:2009.10
4-Aryl-2-hydroxybutanal diethylacetal, prepared from the reaction of benzyl Grignard reagent and glycidaldehyde diethylacetal, was treated with titanium tetrachloride to give 2-tetralone in good yield. This highly efficient transformation involves tandem oxonium formation, intramolecular Friedel–Crafts alkylation, deethoxylation, and tautomerization in the same flask.
A New Synthesis of 5,8‐Dimethyl‐2‐tetralone—A Potential Intermediate for the Synthesis of Ring‐A Aromatic Sesquiterpenes. Novel Transformation During Acetoxylation of 5,8‐Dimethyldihydronapthalene
作者:Ajoy K. Banerjee、William Vera、Manuel S. Laya
DOI:10.1081/scc-120038516
日期:2004.12.31
Abstract An efficient synthesis of 5,8‐dimethyl‐2‐tetralone 4 starting from 5,8‐dimethyl‐1‐tetralone 2 is described. It was converted into the unsaturated derivative 3, which on epoxidation followed by acid hydrolysis yielded tetralone 4. Acetoxylation of 3 with manganese(III) acetate and potassium bromide afforded dimethylnaphthalene 8 and derivative 9. †Dedicated to the memory of Dr. Marcel Roche
The First Synthesis of Natural Occurring Juncaceae Coumarin, 9-Hydroxy-8-methyl-3H-benzo[f]chromen-3-one, Featuring a One-pot Rearrangement and Aromatization Cascade
The synthesis of benzocoumarins from β‐tetralones has been achieved via two pathways in the first total synthesis of the Juncaceaenatural product, 9‐hydroxy‐8‐methyl‐3H‐benzo[f]chromen‐3‐one, featuring a one‐pot rearrangement and aromatizationcascade.
Abstract The conversion of tetralone 1 to methylketone 7, a valuable intermediate of occidol 8, has been accomplished in four steps (reduction, mesylation, cyanation, and Grignard reaction with methylmagnesiumbromide).
.alpha.-Adrenergic agents. 2. Synthesis and .alpha.1-agonist activity of 2-aminotetralins
作者:R. M. DeMarinis、D. H. Shah、R. F. Hall、J. P. Hieble、R. G. Pendleton
DOI:10.1021/jm00344a009
日期:1982.2
Substituted 2-aminotetralins are potent, selective, direct-acting agonists at postjunctional alpha 1 receptors. Within this series, substituent alterations on the ring, as well as on the nitrogen, change the potency of compounds by over three orders of magnitude (EC50 = 12 to greater than 10 000 nM). It has been demonstrated experimentally that substitution at both the 5 and 8 positions of the aromatic ring produces optimum agonist potency. Removal of either substituent results in a loss of potency and efficacy relative to norepinephrine. Substitution at positions 6 and/or 7 is generally detrimental to activity. Methyl, ethyl, or dimethyl substitution on nitrogen is compatible with high agonist potency, while substitution with larger groups is not. The most potent agonist in this series is 5-(thiomethyl)-8-methoxy-2-aminotetralin, which has an EC50 of 12 nM.