Esters metal catalysis

Allyloxysilyl)diazoacetic esters 6 and the homologous butenyloxy derivative 9 undergo intramolecular cyclopropanation to form 7 and 10, respectively, when decomposed photochemically or by transition metal catalysis. The thermal reaction of 9 produces the same result, whereas the l-oxa-2-sila-3-cyclopentene 8 is formed from 6, presumably via a pyrazoline intermediate. 

Enantiomerically pure phenyldiazoacetic esters [1217] and vinyldiazoacetic esters [956] react with alcohols upon transition metal catalysis to yield a-alkoxyesters with low diastereoselectivity (< 53% de). 

During the coverage period of this chapter, reviews have appeared on the following topics reactions of electrophiles with polyfluorinated alkenes, the mechanisms of intramolecular hydroacylation and hydrosilylation, Prins reaction (reviewed and redefined), synthesis of esters of /3-amino acids by Michael addition of amines and metal amides to esters of a,/3-unsaturated carboxylic acids," the 1,4-addition of benzotriazole-stabilized carbanions to Michael acceptors, control of asymmetry in Michael additions via the use of nucleophiles bearing chiral centres, a-unsaturated systems with the chirality at the y-position, and the presence of chiral ligands or other chiral mediators, syntheses of carbo- and hetero-cyclic compounds via Michael addition of enolates and activated phenols, respectively, to o ,jS-unsaturated nitriles, and transition metal catalysis of the Michael addition of 1,3-dicarbonyl compounds. ... 

Plastourgou, M. and Hoffman, M.R. Transformation and fate of organic esters in layered-flow systems the role of trace metal catalysis. Environ. Sci Techno , 18(10) 756-764, 1984. 

Dissolved metals and metal-containing surfaces play an important role in the transformation of organic contaminants in the subsurface environment. Metal ions can catalyze hydrolysis in a way similar to acid catalysis. Organic hydrolyzable compounds susceptible to metal ion catalysis include carboxylic acids, esters, amides, anilides, and phosphate-containing esters. Metal ions and protons... 

Ojima and co-workers first reported the RhCl(PPh2)3-catalyzed hydrosilylation of carbonyl-containing compounds to silyl ethers in 1972.164 Since that time, a number of transition metal complexes have been investigated for activity in the system, and transition metal catalysis is now a well-established route for the reduction of ketones and aldehydes.9 Some of the advances in this area include the development of manganese,165 molybdenum,166 and ruthenium167 complex catalysts, and work by the Buchwald and Cutler groups toward extension of the system to hydrosilylations of ester substrates.168... 

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