Contains such mechanisms as addition and removal reactions, nucleophilic and electrophilic fragrant substitutions, and molecular rearrangements.
* every one bankruptcy offers with particular response forms, reviewing the former year's advancements within the area.
* broadly referenced to prior volumes and first journals.
Chapter 1 Reactions of Aldehydes and Ketones and their Derivatives (pages 1–35): B. A. Murray
Chapter 2 Reactions of Carboxylic, Phosphoric and Sulfonic Acids and their Derivatives (pages 37–97): W. J. Spillane
Chapter three Radical Reactions: half 1 (pages 99–137): A. J. Clark and R. P. Filik
Chapter four Radical Reactions: half 2 (pages 139–178): A. P. Dobbs and J. N. Martin
Chapter five Oxidation and relief (pages 179–219): B. G. Davis and J. A. G. Williams
Chapter 6 Carbenes and Nitrenes (pages 221–239): J. G. Knight
Chapter 7 Nucleophilic fragrant Substitution (pages 241–257): M. R. Crampton
Chapter eight Electrophilic fragrant Substitution (pages 259–271): R. G. Coombes
Chapter nine Carbocations (pages 273–297): R. A. Cox
Chapter 10 Nucleophilic Aliphatic Substitution (pages 299–326): J. Shorter
Chapter eleven Carbanions and Electrophilic Aliphatic Substitution (pages 327–360): A. C. Knipe
Chapter 12 removing Reactions (pages 361–390): A. C. Knipe
Chapter thirteen Addition Reactions: Polar Addition (pages 391–427): P. Kocovsky
Chapter 14 Addition Reactions: Cycloaddition (pages 429–472): N. Dennis
Chapter 15 Molecular Rearrangements (pages 473–603): A. W. Murray
Read Online or Download Organic Reaction Mechanisms 1997: An Annual Survey Covering the Literature Dated December 1996 to November 1997 PDF
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Additional info for Organic Reaction Mechanisms 1997: An Annual Survey Covering the Literature Dated December 1996 to November 1997
85 The interrelationship of the reactant and product stereochemistries has been investigated, as have the methods used to promote the reaction. For both thermal and proton-promoted reactions, [(Z)-57 gave (cis-58), and [(E)-57] gave (trans-58), whereas (trans-58) was the predominant or exclusive product of Lewis acid mediation, regardless of the double bond geometry of (57). Mechanisms are proposed. 86 Aldehydes are signi®cantly more reactive. It is suggested that the primary activating in¯uence is hydrogen bonding to the carbonyl.
57 This stereoselective aldol reaction is proposed to depend upon tricoordination by lithium of the enolate, sul®nyl, and carbonyl oxygens of the substrates. 60a For the four substrates studied (32; n 2, R Me; n 3, R H=Me=Ph), results have been obtained for both the aldol addition to give ketol (33), and the elimination to the enone (34). A rate±equilibrium mismatch for the overall process is examined in the context of Baldwin's rules. e. bnaphthol). In all cases, Marcus theory can be applied to these intramolecular aldol reactions, and it predicts essentially the same intrinsic barrier as for their intermolecular counterparts.
87a The corresponding di¯uoro compound (59; X F) catalyses allylsilane addition87b , and may also involve oligomers as effective catalytic species. Using these observations, a new ¯uorotitanium-TADDOLate (60; TADDOL tetraaryldihydroxydioxolane) has been reported to catalyse the reduction of benzaldehyde ef®ciently87c at À78 C. 0 mol%, again suggesting an oligomeric contribution to catalysis. 89 In contrast to many comparable allylations of carbonyl compounds, ketones do not react. 92 This useful type of aldol reaction is also compared with the corresponding allylsilane version.