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Search results for: claisen condensation

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... O-Alkylation of the aldehyde 11 followed by Claisen rearrangement established the alkylated quaternary center. ... norbornane 8 as a single diastereomer. Condensation of the derived ketone 9 with acetone ...
URL: http://www.organic-chemistry.org/Highlights/2010/02August.shtm
... the key quaternary stereocenter generated in a Ireland-Claisen rearrangement. The rearrangement precursor- an ... after Swern oxidation performed a regioselective aldol condensation to give the desired G-ring. For ...
URL: http://www.organic-chemistry.org/totalsynthesis/totsyn04/pinnatoxin-a-zakarian.shtm
... and after protecting group transformation, a Claisen condensation followed by decarboxylation was used to ... the quinoline moiety, completing the formal synthesis. For sure! Some thanks to ...
URL: http://www.organic-chemistry.org/totalsynthesis/totsyn04/quinine-woodward-williams.shtm
... improvement. A second route involved a Claisen condensation approach; using an acid-chloride analogue ... the Weinreb amide above, and a ?-ketoester. The unnecessary allylic ester moiety was ...
URL: http://www.organic-chemistry.org/totalsynthesis/totsyn05/aigialomycin-d-barrett.shtm
... took them to the precursor of two Claisen rearrangements. The first is perhaps the ... steps further on (including a Henry condensation and a stereoselective methylation), and ...
URL: http://www.organic-chemistry.org/totalsynthesis/totsyn06/daphmanidin-e-carreira.shtm
... but that was inconsequential, as the Claisen rearrangement reinstated it as the desired quaternary ... easily. Certainly better than the Knovenagel-type condensation I would have attempted A few more ...
URL: http://www.organic-chemistry.org/totalsynthesis/totsyn06/hyperforin-shibasaki-kanai.shtm
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