New bicyclic antidepressant agent. Synthesis and activity of napactadine and related compounds
作者:James R. McCarthy、Donald L. Wright、Albert J. Schuster、Abdul H. Abdallah、Philip J. Shea、Randy Eyster
DOI:10.1021/jm00149a031
日期:1985.11
A number of N,N'-dialkylarylamidines were synthesized and evaluated for antidepressant activity. Several of these compounds were synthesized from the corresponding nitriles by a new method. Slight structural modification in the series caused a marked change in biological activity and led to compounds as active as imipramine. The arylacetamidine, N,N'-dimethyl-2-naphthaleneethanimidamide hydrochloride
Copper(II)-Catalyzed Benzylic C(sp<sup>3</sup>)–H Aerobic Oxidation of (Hetero)Aryl Acetimidates: Synthesis of Aryl-α-ketoesters
作者:Yogesh Kumar、Yogesh Jaiswal、Amit Kumar
DOI:10.1021/acs.joc.6b02176
日期:2016.12.16
straightforward method is developed in this paper for the synthesis of α-ketoesters through copper-catalyzed aerobic oxidation of (hetero)aryl acetimidates using molecular oxygen as a sustainable oxidant. The reaction represents the first example of the direct synthesis of aryl-α-ketoesters from arylacetimidates through the aerobic oxidation of a benzylic C(sp3)–H (C═O) bond in moderate to good yield. This transformation
N,N.fwdarw.-disubstituted 2-naphthaleneethanimidamide is prepared by the conversion of a nitrile into the novel imido ester salt intermediate by alcoholysis followed by treatment of the intermediate with an alkylamine to give the product.
Oxidative Rearrangement of 2-Substituted Oxazolines. A Novel Entry to 5,6-Dihydro-2<i>H</i>-1,4-oxazin-2-ones and Morpholin-2-ones
作者:Cynthia M. Shafer、Tadeusz F. Molinski
DOI:10.1021/jo952144f
日期:1996.1.1
A novel synthesis of 5,6-dihydro-2H-1,4-oxazin-2-ones by SeO2-promoted oxidative rearrangement of 2-alkyl- and 2-(arylmethyl)oxazolines is described. Yields are good to excellent; (up to 94%) with the highest yields obtained for 2-arylmethyl- and 2-neopentyl-substituted oxazolines. This reaction provides convenient access to novel 5-aryl-substituted dihydrooxazinones in high yield. The latter compounds are important ''chiral glycine'' synthons for asymmetric synthesis of a-amino acids. Since oxazolines are readily derived from carboxylic acids or their equivalents, this oxidative rearrangement constitutes an entry to synthesis of a-amino acids from carboxylic acids. A mechanism is proposed to account for the rearrangement involving a ''nitrilium to acylium'' 1,2-migration.