Malinowski JT, McCarver SJ, Johnson JS. Diastereocontrolled construction of pactamycin's complex ureido triol functional array.
Org Lett 2012;
14:2878-81. [PMID:
22617016 PMCID:
PMC3366368 DOI:
10.1021/ol301140c]
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Abstract
An advanced intermediate in a projected synthesis of pactamycin has been prepared. Early installation of the C1-dimethylurea functionality allows for its participation in a diastereoselective, chelation-controlled addition of organometal nucleophiles to the C5 prochiral ketone. Four of the molecule's six stereocenters are set with a ketone functional handle provided for subsequent manipulation.
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