Big Chemical Encyclopedia

Chemical substances, components, reactions, process design ...

Articles Figures Tables About

Ketene chemistry

W. D. Wulff, Transition Metal Carbene Complexes Alkyne and Vinyl Ketene Chemistry, in Comprehensive Organometallic Chemistry II, Vol. 12, L. S. Hegedus, Ed., Pergamon, Tarrytown, NY, 1995, Chapter 5.3, pp. 469/. [Pg.587]

Hegedus et al. discovered that irradiation of chromium-carbene complexes resulted in a photoinsertion of CO into the Cr-carbene bond to form Cr-ketene complexes [96, 97]. This opened novel routes to the preparation of valuable compounds via Cr-ketene chemistry. Among them, the reaction of metallated ketenes with imines was intensively explored [98-100]. Within this context, the reaction between several model Cr-ketenes (120) and imines was explored at the B3LYP/6-31G ECP level of theory [101, 102], The mechanisms thus obtained are reported in Scheme 31. [Pg.336]

A short review of the first 100 years of ketene chemistry covers haloketenes, Wolff (g) rearrangements, stereoselective nucleophilic attack, dimerization, cycloadditions, ketene-Claisen and -Cope reactions, bisketenes, and free radical processes.12 ... [Pg.3]

Ketene chemistry is discussed more fully in Chapter 3J. [Pg.265]

The cycloaddition of diphenylketene with cyclopentadiene is a classic reaction in ketene chemistry that has long been studied, but the interpretation of this... [Pg.251]

Reductive dechlorination of a-chloroacyl chlorides by zinc or the zinc-copper couple is frequently used in ketene chemistry.243 Sonochemical improvements minimizing side reactions were found (p. 345).244 Ordinary zinc can be used, and... [Pg.215]

Ketene chemistry has been pursued since the discovery of diphenylke-tene by Staudinger in 1905, and his subsequent work soon after. This useful family of reactive species was already the subject of a monograph in... [Pg.230]

See other pages where Ketene chemistry is mentioned: [Pg.116]    [Pg.95]    [Pg.100]    [Pg.147]    [Pg.95]    [Pg.100]    [Pg.682]    [Pg.280]    [Pg.282]    [Pg.208]    [Pg.218]    [Pg.104]    [Pg.280]    [Pg.229]    [Pg.230]    [Pg.230]    [Pg.231]    [Pg.233]    [Pg.235]    [Pg.237]    [Pg.239]    [Pg.241]    [Pg.243]    [Pg.245]    [Pg.247]    [Pg.249]    [Pg.251]    [Pg.253]    [Pg.255]    [Pg.257]    [Pg.259]    [Pg.261]    [Pg.263]    [Pg.265]    [Pg.267]    [Pg.269]    [Pg.271]    [Pg.273]    [Pg.275]    [Pg.277]    [Pg.279]   


SEARCH



© 2024 chempedia.info