Synthesis of Chiral Bitetralin-strapped “Twin Coronet” Porphyrins. Catalytic and Asymmetric Epoxidation of Styrene Derivatives

1991 ◽  
Vol 20 (11) ◽  
pp. 1933-1936 ◽  
Author(s):  
Yoshinori Naruta ◽  
Nobuo Ishihara ◽  
Fumito Tani ◽  
Kazuhiro Maruyama
Keyword(s):  
Asymmetric Epoxidation ◽  
Styrene Derivatives

Chiral porphyrin imine manganese complex as catalyst for asymmetric epoxidation of styrene derivatives

Chirality ◽  
2019 ◽  
Vol 31 (3) ◽  
pp. 155-163 ◽  
Author(s):  
Nallamuthu Ananthi ◽  
I.V. Muthu Vijayan Enoch
Keyword(s):  
Manganese Complex ◽  
Asymmetric Epoxidation ◽  
Styrene Derivatives

Visible Light-Induced Sulfonylation/Arylation of Styrenes in a Double Radical Three-Component Photoredox Reaction

2019 ◽  
Author(s):  
Benjamin Lipp ◽  
Lisa Marie Kammer ◽  
Murat Kucukdisli ◽  
Adriana Luque ◽  
Jonas Kühlborn ◽  
...  
Keyword(s):  
Visible Light ◽  
Radical Formation ◽  
Three Component Reaction ◽  
Broad Variety ◽  
Styrene Derivatives ◽  
Mechanistic Investigations

Simultaneous sulfonylation/arylation of styrene derivatives is achieved in a photoredox-catalyzed three-component reaction using visible light. A broad variety of difunctionalized products is accessible in mostly excellent yields and high diastereoselectivity. The developed reaction is scalable and suitable for the modification of styrene-functionalized biomolecules. Mechanistic investigations suggest the transformation to be operating through a designed sequence of radical formation and radical combination.<br>

[OsH4(PPh3)3]: New Catalyst for the Selective Cyclopropanation of Activated Olefins

1996 ◽  
Vol 61 (12) ◽  
pp. 1798-1804 ◽  
Author(s):  
Albert Demonceau ◽  
François Simal ◽  
Corine A. Lemoine ◽  
Alfred F. Noels ◽  
Igor T. Chizhevsky ◽  
...  
Keyword(s):  
Title Compound ◽  
Efficient Catalyst ◽  
Ethyl Diazoacetate ◽  
Styrene Derivatives ◽  
Activated Olefins ◽  
Cyclic Alkenes

The title compound was found to be an efficient catalyst for the selective cyclopropanation of activated olefins by ethyl diazoacetate. The cyclopropane yields range from moderate to good (75 to 95%) for activated olefins such as styrene and styrene derivatives, but are rather low (20 to 30%) for non-activated olefins such as terminal and cyclic alkenes. In the intermolecular competition, styrene was 45 times more reactive than cyclooctene. In all cases, trans (exo) cyclopropane predominated over the cis (endo) isomer.

The mechanism of polyleucine catalysed asymmetric epoxidation

2004 ◽  
pp. 2018 ◽  
Author(s):  
David R. Kelly ◽  
Stanley M. Roberts
Keyword(s):  
Asymmetric Epoxidation
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