Get Alkene Metathesis in Organic Synthesis (Topics in PDF

By Alois Fuerstner

ISBN-10: 3540642544

ISBN-13: 9783540642541

The large growth in olefin metathesis completed over the past decade can infrequently be over priced. a result of improvement of a brand new new release of good outlined and high-performance organometallic catalysts, this response is speedily evolving into some of the most flexible instruments for complicated natural chemistry, average product synthesis, nice chemical construction and polymer sciences. Written via a few of the major specialists during this box, this monograph intends to familiarize the reader with the main fascinating advancements and frontiers during this flourishing box of chemistry learn.

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Extra info for Alkene Metathesis in Organic Synthesis (Topics in Organometallic Chemistry) (Vol 1)

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E. the ring opening metathesis polymeri- 52 A. Fürstner Scheme 12. zation (ROMP) of cycloalkenes with 8–11 ring atoms, is a highly favored process due to the release of ring strain [1]. Despite this seemingly adverse situation, a rapidly growing number of successful applications indicates that even medium sized rings can be prepared by RCM in moderate to excellent yields (Tables 1, 4) [29]. It is likely that the entropy gained upon dissecting one diene into two olefins together with the evaporative loss of ethylene (cf.

6 . . . . . . . . . . . . . . . . . . 63 64 64 66 66 . . . . 66 References . . . . . . . . . . . . . . . . . 70 1 Introduction The metathesis activity of various simple ruthenium compounds has already been discerned during early studies on the ring opening metathesis polymerization (ROMP) of norbornene and other cycloalkene substrates [1, 2]. A real breakthrough, however, was achieved when Grubbs et al. reported in the early 1990s that ruthenium-carbene complexes of the general type 1 are highly active single component (pre)catalysts for any kind of olefin metathesis reaction (Fig.

The mixture of cis and trans double bonds in the resulting poly(norbornene) could be taken as evidence that both rotamers of the living polymer are involved. Molybdenum catalysts have been employed to prepare a variety of poly(norbornene) or poly(norbornadiene) ROMP polymers [30]. Since 1993 papers have appeared that report polymers that contain redox-active groups [129, 130], photo- or electroluminescent groups [131–133], side-chain liquid crystals [134– 140], metal nanoclusters [141–144], semiconductor nanoclusters [145–148], sugars [149], and amino acid residues [150].

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Alkene Metathesis in Organic Synthesis (Topics in Organometallic Chemistry) (Vol 1) by Alois Fuerstner

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