Imino Glycals via Ruthenium-Catalyzed RCM and Isomerization
作者:Bernd Schmidt、Sylvia Hauke、Nino Mühlenberg
DOI:10.1055/s-0033-1338615
日期:——
enamides via a ruthenium-catalyzed assisted tandem catalytic ring-closing metathesis–isomerization sequence. The sequence relies on the in situ transformation of a metathesis active Ru–carbene into an isomerization active Ru–hydride by addition of hydroxide as a chemical trigger. N-Allyl-N-homoallylamines were converted in one step into cyclic enamides via a ruthenium-catalyzed assisted tandem catalytic
Complementary routes to both enantiomers of pipecolic acid and 4,5-dihydroxypipecolic acid derivatives
作者:Shital K. Chattopadhyay、Titas Biswas、Tanmoy Biswas
DOI:10.1016/j.tetlet.2007.12.097
日期:2008.2
Complementary new routes to bothenantiomers of N-protected pipecolicacid and the corresponding 4,5-dihydroxylated derivatives are developed, which involve stereo-divergent allylation of a chiral N-allylimine and ring-closing metathesis as key steps.