Three-Component Coupling Reaction: Palladium-Catalyzed Coupling of Norbornadiene and Iodonium Salts or Diazonium Salts with Organostannanes, Alkynes, and Sodium Tetraphenylborate
Divergent Strategies for the π-Extension of Heteroaryl Halides Using Norbornadiene as an Acetylene Synthon
作者:Siyeon Jeong、Eunmin Kim、Minkyu Kim、Ye Ji Hwang、Birakishore Padhi、Jonghoon Choi、Yunho Lee、Jung Min Joo
DOI:10.1021/acs.orglett.0c03732
日期:2020.12.18
reactions of five-membered heteroaryl halides and norbornadiene (NBD) were developed. Either direct addition of (benzo)azoles or 2:1 annulation was achieved depending on the propensity of the intermediate complex to undergo palladacycle formation, determined by the nature and substitution pattern of the heteroarene. The obtained exo- and cis-diheteroaryl norbornenes underwent epimerization and retro-Diels–Alder
Pd-Catalyzed C–H Annulation of Five-Membered Heteroaryl Halides with Norbornene Derivatives
作者:Birakishore Padhi、Geunhee Kang、Eunmin Kim、Jeongmin Ha、Hyun Tae Kim、Jeewoo Lim、Jung Min Joo
DOI:10.1021/acscatal.9b05177
日期:2020.2.7
Complementary to Catellani-type reactions and 1:1 coupling of six-membered halo(hetero)arenes and norbornene (NBE) derivatives, Pd-catalyzed 1:2 coupling of five-membered haloheteroarenes with NBEs was achieved to afford rigid nonplanar heterocycles. Pyrazole, thiophene, furan, and indole underwent exo- and trans-selective annulation. Two strained alkene groups of the resulting products were further
A palladium-catalyzed difunctionalization of bicyclicalkenes with organoammonium salts and organoboronic compounds was reported. A wide range of functionalized cyclic products, including those bearing functional groups, were produced stereoselectively in good to excellent yields. The gram-scale experiment, one-pot operation, and synthetic application of β-borylated products further demonstrated the
Tandem Suzuki Coupling−Norbornadiene Insertion Reactions. A Convenient Route to 5,6-Diarylnorbornene Compounds
作者:Katie M. Shaulis、Bradley L. Hoskin、John R. Townsend、Felix E. Goodson、Christopher D. Incarvito、Arnold L. Rheingold
DOI:10.1021/jo016212b
日期:2002.8.1
This paper presents optimization studies on a palladium-catalyzed tandem norbornadiene insertion-Suzuki coupling reaction, which provides a one-pot procedure for the formation of diarylnorbornene derivatives. This procedure allows for the synthesis of these compounds from readily available aryl halides, arylboronic acids, and substituted norbornadienes.