Highly Stereoselective 2-Oxonia-Cope Rearrangement: A Platform Enabling At-Will Control of Regio-, Enantio-, and Diastereoselectivity in the Vinylogous Aldol Reactions of Aldehydes
作者:Akhil Padarti、Dongeun Kim、Hyunsoo Han
DOI:10.1021/acs.orglett.7b03895
日期:2018.2.2
the vinylogous aldolation of aldehydes is described, which exploits 2-oxonia-Cope rearrangement reactions between two readily available partners, a set of rationally designed chiral homoallylic alcohol synthons and aldehydes, under simple conditions. In these processes, chirality transfer from the former to the latter is nearly perfect, giving rise to excellent enantio- and diastereoselectivity without
Stereochemistry of the reaction of Si–phenyl silenes with butadienes: elaboration of the silacycloadducts to provide a novel route to substituted lactones
作者:Mahesh J. Sanganee、Patrick G. Steel、Daniel K. Whelligan
DOI:10.1039/b404175e
日期:——
silacycles accompanied by variable amounts of competing ene, [2 + 2] and silene dimer by-products. The silacycles are formed with good chemo- and stereo-selectivity and provide access to diols and lactones via a phenyl-triggered Fleming-Tamao oxidation.