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Search results for: sharpless epoxidation

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... Enantioselective Construction of Arrays of Stereogenic Centers Sharpless asymmetric epoxidation has long been a workhorse ... enantioselective synthesis. The SAE protocol, however, gives only mediocre ee ' s ...
URL: https://www.organic-chemistry.org/Highlights/2006/31July.shtm
... are of course easily prepared using a Sharpless asymmetric epoxidation. Treatment of the chloro ... with three equivalents of butyl lithium results first in opening of the epoxide to give ...
URL: https://www.organic-chemistry.org/totalsynthesis/totsyn04/pestalotiopsin-a-tadano.shtm
... This uses almost identical conditions to the Sharpless asymmetric epoxidation to allow asymmetric oxidation of ... sulfide, and normally works really well if the two sides of the prochiral sulfide ...
URL: https://www.organic-chemistry.org/totalsynthesis/totsyn05/amphidinolide-x-lee.shtm
... The starting material 20 was prepared by Sharpless epoxidation. Acetylide opening was highly regioselective ... to give 21. After protecting group exchange, tungsten-mediated cyclization of 22 gave 23 ...
URL: https://www.organic-chemistry.org/Highlights/2006/30JanuaryB.shtm
... alkenyl addition to 10, prepared by Sharpless asymmetric epoxidation. The ee of 12 ... the same as the ee of 10. It might be possible to devise a ...
URL: https://www.organic-chemistry.org/Highlights/2006/17July.shtm
... easily; asymmetry was introduced via a Sharpless epoxidation, and the resulting epoxide opened ... an allyl cuprate. A few more steps including a 1-c homologation returned the desired ...
URL: https://www.organic-chemistry.org/totalsynthesis/totsyn05/polyanthellin-a-johnson.shtm
... quicker, installing the asymmetry using a Sharpless dihydroxylation and a procedure developed by Yadav ... , some deprotections and finally a selective epoxidation of the cyclohexadienone. This final reaction ...
URL: https://www.organic-chemistry.org/totalsynthesis/totsyn05/sporolide-b-nicolaou.shtm
... The diol stereochemistry was unsurprisingly installed using Sharpless' chemistry- in this case a ... asymmetric epoxidation, followed by opening of the allylic epoxide to install the amine. ...
URL: https://www.organic-chemistry.org/totalsynthesis/totsyn06/loline-trauner.shtm
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