There is, I think, something ethereal about i —the square root of minus one. I remember first hearing about it at school. It seemed an odd beast at that time—an intruder hovering on the edge of reality.

Usually familiarity dulls this sense of the bizarre, but in the case of i it was the reverse: over the years the sense of its surreal nature intensified. It seemed that it was impossible to write mathematics that described the real world in …

I and i

Catalysis by transition metal complexes of alkene silylation – recent progress and mechanistic implications

Bromination is one of the most important transformations in organic synthesis and can be carried out using bromine and many other bromo compounds. Use of molecular bromine in organic synthesis is well-known. However, due to the hazardous nature of bromine, enormous growth has been witnessed in the past several decades for the development of solid bromine carriers. This review outlines the use of bromine and different bromo-organic compounds in organic synthesis. The applications of bromine, a total of 107 bromo-organic compounds, 11 other brominating agents, and a few natural bromine sources were incorporated. The scope of these reagents for various organic transformations such as bromination, cohalogenation, oxidation, cyclization, ring-opening reactions, substitution, rearrangement, hydrolysis, catalysis, etc. has been described briefly to highlight important aspects of the bromo-organic compounds in organic synthesis.

Use of Bromine and Bromo-Organic Compounds in Organic Synthesis

Graphene oxide-based materials for efficient removal of heavy metal ions from aqueous solution: A review.

The palladium catalysed cross-coupling of organosilicon reagents with organo halides and pseudo-halides has developed over the past 30 years into an efficient and attractive carbon–carbon bond forming strategy. Extensive research within this field to expand and diversify on the scope of the organosilicon coupling reaction will continue to promote its use in the synthesis of biologically and pharmaceutically important organic molecules. The recent advances made within this area are explored in this critical review (199 references).

Palladium-catalysed cross-coupling of organosilicon reagents

A new efficient synthetic protocol for highly stereoselective synthesis of (Z)-1,2-bis(ethoxydimethylsilyl)arylethenes from vinylsilanes based on sequential ruthenium-catalyzed silylative coupling-palladium-catalyzed Heck coupling is reported. Reactivity of title compounds towards carbon electrophiles in the catalytic desilylative arylation is discussed. Copyright © 2010 John Wiley & Sons, Ltd.

(Z)-1,2-bis(ethoxydimethylsilyl)arylethenes as new building blocks for organic synthesis

In situ Mo(CO)₆-based catalysts for alkyne metathesis: Silanols vs phenols as co-catalysts under thermal and photochemical activation

A new convenient and effective method for the synthesis of unsymmetrical 1,1-bis(silyl)ethenes is described. The synthetic methodology involves selective silylative coupling cyclization of N-methyl-N-(dimethylvinylsilyl)-2-(dimethylvinylsilyloxy)ethanamine catalyzed by a ruthenium hydride complex and subsequent one-pot reaction of the cyclic bis(silyl)derivative with Grignard reagents followed by alcoholysis. As a result, a variety of 1,1-bis(silyl)ethenes containing different substituents at the silicon atoms were produced in regiocontrolled manner with considerably high efficiency.

An Efficient Synthesis of Unsymmetrical 1,1‐Bis(silyl)ethenes.

Synthetically useful 1,1 -dibromo-2-arylethenes were readily prepared in good yields via double bromodesilylation of the easily accessible 1,1 -bis(trimethylsilyl)-2-arylethenes using N-bromosuccinimide under mild conditions.

A New Facile Synthesis of 1,1-Dibromo-2-arylethenes

Synthetically useful (Z)-2-aryl-l-iodo-1-silylethenes were prepared in good to excellent yields via one-pot monolododesilylation/isomerization of readily accessible 2-aryl-1,1-bis(silyl)ethenes using N-iodosuccinimide or bis(pyridine)iodonium tetrafluoroborate under mild conditions.

Piotr Pawluć

Papers

(Z)-1,2-bis(ethoxydimethylsilyl)arylethenes as new building blocks for organic synthesis

In situ Mo(CO)₆-based catalysts for alkyne metathesis: Silanols vs phenols as co-catalysts under thermal and photochemical activation

An Efficient Synthesis of Unsymmetrical 1,1‐Bis(silyl)ethenes.

A New Facile Synthesis of 1,1-Dibromo-2-arylethenes

New Stereoselective Synthesisof (Z)-α-Iodovinylsilanes viaOne-Pot Iododesilylation/Isomerization of 1,1-Bis(silyl)alk-1-enes