Introduction of Acetoxyl Group in Tropone and Azulene Nuclei Using Palladium(II) Acetate: Reactions of 2-Aminotropones and Azulenes with Palladium(II) Acetate.
2-Substituted tropones reacted with Fe2(CO)9 or with Fe(CO)5 under irradiation to give iron tricarbonyl complexes coordinated at unsubstituted diene moiety. 2-Bromotropone afforded another iron tricarbonyl complex coordinated at substituted diene as a minor product. 2-Methyl-, 2-phenyl-, and 2-tosyloxytropones yielded di-π-allyl type diiron hexacarbonyl complexes. Furthermore, 2-dialkylaminotropones
Introduction of Acetoxyl Group in Tropone and Azulene Nuclei Using Palladium(II) Acetate: Reactions of 2-Aminotropones and Azulenes with Palladium(II) Acetate.
Reactiond of 2-(N, N-dimethylamino)- and 2-(N, N-diethylamino)tropones with palladium (II) acetate in benzene in the presence of sodium acetate afforded the corresponding 7-acetoxylated 2-aminotropones. A similar acetoxylation reaction proceeded with azulene to give 1-acetoxy- and 1, 3-diacetoxyazulenes. On the other hand, phenylation at the 7-position occurred in the reaciton using 2-(N-methyl)anilinotoropone. The acetoxylations are considered to proceed through radical cation complexes formed through oxidation of amino groups by palladium.
Novel cinnamic acid analogues: synthesis of aminotroponyl acrylates by Pd(<scp>ii</scp>)-catalysed C(sp<sup>2</sup>)–H olefination
作者:Chinmay K. Jena、Nagendra K. Sharma
DOI:10.1039/d2cc02276a
日期:——
Cinnamic acid, a benzenoid scaffold, is a building block of various natural products. This report describes the synthesis of new non-benzenoid cinnamate analogs, 3-(6-amino-7-oxocyclohepta-1,3,5-trien-1-yl)acrylates, obtained through Pd(II)-catalyzed C7-H olefination of 2-aminotropones in the presence of acrylates. In these site-selective couplings, the troponyl-carbonyl function acts as a directing
肉桂酸是一种苯类支架,是各种天然产物的组成部分。本报告描述了通过 Pd( II ) 催化的 C7-H 烯化获得的新型非苯型肉桂酸酯类似物 3-(6-amino-7-oxocyclohepta-1,3,5-trien-1-yl) 丙烯酸酯的合成在丙烯酸酯存在下的 2-氨基托酮。在这些位点选择性偶联中,肌醇-羰基官能团充当导向基团。该策略已被用于从含有脯氨酰/脯氨酰胺衍生物的脯氨酰/脯氨酰胺合成新的假肽。这些新的肉桂酸肌钙膦类似物是发夹形成肽的潜在前体。