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

[신간의 별자리x] 우리/미술, 그리고 ‘슬픔의 박물관’

Ru-, Rh-, and Pd-Catalyzed C-C Bond Formation Involving C-H Activation and Addition on Unsaturated Substrates: Reactions and Mechanistic Aspects

Catalytic C–H activation has emerged as a powerful tool for sustainable syntheses. In the recent years, notable success was achieved with the development of cobalt-catalyzed C–H functionalizations with either in situ generated or single-component cobalt-complexes under mild reaction conditions. Herein, recent progress in the field of organometallic cobalt-catalyzed C–H activation is reviewed until November 2015.

Cobalt-Catalyzed C―H Activation

The development of new methods for the direct functionalization of unactivated C–H bonds is ushering in a paradigm shift in the field of retrosynthetic analysis. In particular, the catalytic enantioselective functionalization of C–H bonds represents a highly atom- and step-economic approach toward the generation of structural complexity. However, as a result of their ubiquity and low reactivity, controlling both the chemo- and stereoselectivity of such processes constitutes a significant challenge. Herein we comprehensively review all asymmetric transition-metal-catalyzed methodologies that are believed to proceed via an inner-sphere-type mechanism, with an emphasis on the nature of stereochemistry generation. Our analysis serves to document the considerable and rapid progress within in the field, while also highlighting limitations of current methods.

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Catalytic Enantioselective Transformations Involving C-H Bond Cleavage by Transition-Metal Complexes.

THE STEREOSELECTIVE HOMOLYTIC HETEROCYCLIZATION OF DISUBSTITUTED ALKYNES WITH 1,2-ETHANEDITHIOL TO GIVE cis-2,3- DISUBSTITUTED 1,4-DITHIANES

Electrochemical Oxidation of Conjugated Arylolefins (I) to α‐Bromo Ketals (III) and (V).

A new reaction between methanol and polychloroethylenes was discovered; it results in the formation of chloroallyl alcohols.

Reaction of methanol with polychloroethylenes

1.

A series of p-di-n-alkylbenzenes was prepared for the first time by organomagnesium synthesis from p-dibromobenzene, and their viscosity properties and freezing points were studied.




2.

By a two-stage synthesis (chloroalkylation of alkylbenzenes and Grignard condensation of the products with aldehydes) dialkylbenzenes containing branched chains were prepared.

G. I. Nikishin

Papers

THE STEREOSELECTIVE HOMOLYTIC HETEROCYCLIZATION OF DISUBSTITUTED ALKYNES WITH 1,2-ETHANEDITHIOL TO GIVE cis-2,3- DISUBSTITUTED 1,4-DITHIANES

Electrochemical Oxidation of Conjugated Arylolefins (I) to α‐Bromo Ketals (III) and (V).

Reaction of methanol with polychloroethylenes

Synthesis and properties of p-dialkylbenzenes

Synthesis of Nine-, Ten-, and Fifteen-Membered Alkenolides by the Oxidative Cleavage of the Bridging C=C Bond in 2-Oxabicycloalkenes.