ChemInform Abstract: A Tandem Olefin Migration and Prins Cyclization Using Cu(OTf)2-Bisphosphine Complexes: An Improved Synthesis of Functionalized Tetrahydropyrans.

ChemInform ◽  
2012 ◽  
Vol 43 (43) ◽  
pp. no-no
Author(s):  
Arun K. Ghosh ◽  
Daniel R. Nicponski ◽  
Jorden Kass
Keyword(s):  
Prins Cyclization ◽  
Olefin Migration

Dual-Function, Light Switchable Cobalt Catalysis via Active Site Metamorphosis

2019 ◽  
Author(s):  
Enrico Bergamaschi ◽  
Frédéric Beltran ◽  
Christopher Teskey
Keyword(s):  
Visible Light ◽  
Active Site ◽  
Catalytic Site ◽  
Dual Function ◽  
Catalytic Systems ◽  
Hydride Complex ◽  
Dual Functional ◽  
Multiple Processes ◽  
Olefin Migration

<p></p><p></p><p>Switchable catalysis offers opportunities to control the rate or selectivity of a reaction <i>via</i> a stimulus such as pH or light. However, few examples of switchable catalytic systems that can facilitate multiple processes exist. Here we report a rare example of such dual-functional, switchable catalysis. Featuring an easily prepared, bench-stable cobalt(I) hydride complex in conjunction with pinacolborane, we can completely alter the reaction outcome between two widely employed transformations – olefin migration and hydroboration – with visible light as the sole trigger. This dichotomy arises from ligand photodissociation which leads to metamorphosis of the active catalytic site, resulting in divergent mechanistic pathways.</p><p></p><p></p>

scholarly journals ZnAlMCM-41; a very ecofriendly and reusable solid acid catalyst for highly selective synthesis of 1, 3-dioxanes by Prins cyclization of olefins

2021 ◽  
Author(s):  
Manickam Selvaraj ◽  
Mohammed A. Assiri ◽  
Hari Singh ◽  
Jimmy Nelson Appaturi ◽  
Subrahmanyam Ch ◽  
...  
Keyword(s):  
Liquid Phase ◽  
Solid Acid ◽  
Solid Acid Catalyst ◽  
Acid Catalyst ◽  
Selective Synthesis ◽  
Comparison Study ◽  
Catalytic Method ◽  
Prins Cyclization ◽  
Heterogeneous Catalytic

Prins cyclization of styrene (SE) with paraformaldehyde (PFCHO) was conducted with mesoporous ZnAlMCM-41 catalysts for synthesis of 4-phenyl-1,3-dioxane (4-PDO) under a liquid phase heterogeneous catalytic method. For comparison study, the...

scholarly journals Front Cover: Mechanistic Studies on Photoinduced Catalytic Olefin Migration Reactions at the Pd(II) Centers of a Porous Crystal, Metal‐Macrocycle Framework (Chem. Asian J. 3/2021)

2021 ◽  
Vol 16 (3) ◽  
pp. 174-174
Author(s):  
Hirotaka Yonezawa ◽  
Takafumi Shiraogawa ◽  
Mengying Han ◽  
Shohei Tashiro ◽  
Masahiro Ehara ◽  
...  
Keyword(s):  
Mechanistic Studies ◽  
Front Cover ◽  
Porous Crystal ◽  
Olefin Migration

scholarly journals The Silylalkyne-Prins Cyclization: Stereoselective Synthesis of Tetra- and Pentasubstituted Halodihydropyrans.

ChemInform ◽  
2006 ◽  
Vol 37 (34) ◽  
Author(s):  
Pedro O. Miranda ◽  
Miguel A. Ramirez ◽  
Victor S. Martin ◽  
Juan I. Padron
Keyword(s):  
Stereoselective Synthesis ◽  
Prins Cyclization
Sign in / Sign up

Export Citation Format

Share Document