Efficient hydroarylation of terminal alkynes with sodium tetraphenylborate performed in water under mild conditions
作者:P. Kocięcka、A.M. Trzeciak
DOI:10.1016/j.apcata.2019.117243
日期:2020.1
The hydroarylation of terminal alkynes with sodium tetraphenylborate was performed in high yield within 3 h at roomtemperature in water, using palladium(II) complexes with imidazole ligands as catalysts. Under these conditions, differently substituted phenylacetylene substrates were converted to arylalkenes and aryl-substituted dienes. High conversion and excellent selectivity were achieved in the
Catalytic hydroarylation reactions of conjugated dienes are achieved using tris(pentafluorophenyl)borane as a Lewis acid catalyst under mild reaction conditions. This new protocol shows a broad substrate scope for the highly regioselective functionalization of sterically hindered aniline derivatives. Experimental and extensive density functional theory mechanisticstudies show that the complex of residual
共轭二烯的催化加氢芳基化反应是在温和的反应条件下使用三(五氟苯基)硼烷作为路易斯酸催化剂实现的。这个新协议显示了空间位阻苯胺衍生物的高度区域选择性功能化的广泛底物范围。实验和广泛的密度泛函理论机理研究表明,残留水和 B(C 6 F 5 ) 3的络合物在共轭二烯的芳基辅助质子化中起着至关重要的作用,形成烯丙基阳离子中间体,诱导芳烃的亲电芳香取代。苯胺底物。
The reaction of chalcone with phosphonates
作者:E.D. Bergmann、A. Solomonovici
DOI:10.1016/s0040-4020(01)98057-3
日期:1971.1
Chalcone reacts with the anions of triethyl phosphonoacetate (I) and diethyl benzylphosphonate (IV)—depending on the operating conditions—either in a Michael or a Wittig-Horner reaction.
Hydrothermal Photochemistry as a Mechanistic Tool in Organic Geochemistry: The Chemistry of Dibenzyl Ketone
作者:Ziming Yang、Edward D. Lorance、Christiana Bockisch、Lynda B. Williams、Hilairy E. Hartnett、Everett L. Shock、Ian R. Gould
DOI:10.1021/jo500899x
日期:2014.9.5
complex product mixtures that form via multiple reaction pathways. The hydrothermal decompositionreactions of the model ketone dibenzyl ketone form a mixture of reduction, dehydration, fragmentation, and coupling products that suggest simultaneous and competitive radical and ionic reaction pathways. Here we show how Norrish Type I photocleavage of dibenzyl ketone can be used to independently generate the