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Search results for: wittig rearrangement
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... was added to give 12. Selective Wittig reaction protected the aldehyde, allowing deoxygenation ... 4 ) . Allylation followed by Claisen rearrangement led to 5, that was silylated ...
... 17 was an effective catalyst for the arsa-Wittig reaction, mediating the preparation of the ... key spiro center of 39 by the rearrangement of the epoxide 37 to the aldehyde ...
... made by Amos Smith) via a Wittig olefination , and lastly a Mitsunobu macrolactonisation ... Nelson; an alkene isomerisation and Claisen rearrangement . This approach is very similar to ...
... . The aldehyde 2 was assembled by Wittig homologation of the aldehyde 5 with the ... 2 to give, via Lewis acid-mediated rearrangement of the initially-prepared acetal, the aldehyde ...
... using the Shi catalyst, and a Wittig methylenation . Then we're set for the ... knowledge will be ready for the Brook rearrangement / alkylation that generates the silyl enolether ...
... hemiacetal shown above, they did a Wittig olefination to give an enyne. Again ... . The oxonium ion produced is then rearranged by attack of the ketone to provide ...
... SYNTHESIS/PODAND IONOPHORES/VITAMIN-D Georg Wittig and his accomplishments: Still relevant beyond ... [2 ,3 ] -Sigmatropic Rearrangements. R. W. Hoffmann, ...
... Key Words: HINDERED ORGANOBORON GROUPS/BORON-WITTIG REACTION/DIMESITYLBORON STABILIZED CARBANIONS/DIMETALLIC ... REAGENTS/ALLYLIC ORGANOBISMETALLIC REAGENTS/METALLA-CLAISEN REARRANGEMENT/LITHIUM-TITANIUM EXCHANGE/CROSS-COUPLING REACTION I ...
... /chem.201300546) conditions for the catalytic Wittig reaction of 14 with 15, with ... give 9, the product of Claisen rearrangement . Tsuyoshi Satoh of the Tokyo University ...