Olefins carbonyl compounds

Low-coordinate species of the main group elements of the second row such as carbenes, olefins, carbonyl compounds (ketones, aldehydes, esters, amides, etc.), aromatic compounds, and azo compounds play very important roles in organic chemistry. Although extensive studies have been devoted to these species not only from the physical organic point of view but also from the standpoints of synthetic chemistry and materials science, the heavier element homologues of these low-coordinate species have been postulated in many reactions only as reactive intermediates, and their chemistry has been undeveloped most probably due to... 

Reductive Cyclization of Unactivated Olefinic Carbonyl Compounds 517... 

Reductive Cyclization of Activated Olefinic Carbonyl Compounds 10.10.3.2.1 Reductive aldol cyclization... 

In the hydroboration of terminal alkenes, carrying a ketone or aldehyde group, with a variety of borane reagents, dicyclohexylborane has been identified as the most efficient reagent. Analogous hydroboration of alkynyl ketones and alkynyl aldehydes with dicyclohexylborane yields the corresponding olefinic carbonyl compounds after protonation, or dicarbonyl compounds after oxidation. ... 

An excellent review of the problems of the enantioselective heterocatalytic hydrogenation of prochiral double bonds, covering the literature up to 1970, has been compiled by Izumi57). Raney nickel catalysts modified with chiral amino acids or dipeptides gave only very moderate enantiomeric excesses of between 0 and 10% in the hydrogenation of olefins, carbonyl compounds or oximes 57). Only Raney nickel modified with (S)-tyrosine furnished a higher enantiomeric excess in the products58). 

Olefin hydrogenation, with mono-Cp Ti(IV) halides, 4, 402 Olefinic carbonyl compounds... 

Slayden SW, Liebman JF (1997) Thermochemistry of olefins, carbonyl compounds and imi-nes. In Patai S (ed) The chemistry of doubly-bonded functional groups. The chemistry of functional groups, suppl. A3. Wiley, Chichester, p 537... 

---