A new decarboxylative Csp3-Csp3 coupling approach for the benzylation of ketone enolates has been developed. A variety of raspberry ketone derivatives were conveniently synthesized in good to excellent yields under...
The 4-(<i>tert</i>-Butyldiphenylsiloxy)-3-fluorobenzyl Group: A New Alcohol Protecting Group, Fully Orthogonal with the <i>p</i>-Methoxybenzyl Group and Removable under Desilylation Conditions
作者:David Crich、Linfeng Li、Michio Shirai
DOI:10.1021/jo900026e
日期:2009.3.20
ether-type protectinggroup for alcohols, the 4-(tert-butyldiphenylsiloxy)-3-fluorobenzyl group, is introduced. The protectinggroup is introduced by means of the readily prepared benzyl bromide and is cleaved with tetrabutylammonium fluoride in dimethylformamide under microwave irradiation. The fluoride substituent provides stability to oxidizing conditions, such that the new protectinggroup is fully