Asymmetric Synthesis of Aminocyclopropanes and<i>N</i>-Cyclopropylamino Alcohols Through Direct Amidocyclopropanation of Alkenes Using Chiral Organozinc Carbenoids
作者:Guillaume Bégis、David E. Cladingboel、Laure Jerome、William B. Motherwell、Tom D. Sheppard
DOI:10.1002/ejoc.200801033
日期:2009.4
Chiral N-(diethoxymethyl)oxazolidinones, prepared from the corresponding oxazolidinones by heating in triethyl orthoformate can he used as organozinccarbenoid precursors for the direct enantioselective amidocyclopropanation of alkenes. The reaction is successful with it wide range of oxazolidinones and alkenes and proceeds with moderate to excellent, yield and stereoselectivity. In most cases the
Ruthenium-Catalyzed [2 + 2] Cycloadditions of Ynamides
作者:Nicole Riddell、Karine Villeneuve、William Tam
DOI:10.1021/ol0512841
日期:2005.8.1
[GRAPHICS]Ruthenium-catalyzed [2 + 2] cycloadditions between norbornene and ynamides were investigated. The ynamide moiety was found to be compatible with the ruthenium-catalyzed cycloaddition conditions, giving the corresponding cyclobutene cycloadducts in moderate to good yields (up to 97%).
Katsumura; Iwama; Inagaki, Russian Journal of Organic Chemistry, 1996, vol. 32, # 2, p. 225 - 229
作者:Katsumura、Iwama、Inagaki、Fujii、Ikeda
DOI:——
日期:——
Ruthenium-catalyzed [2+2] cycloadditions of bicyclic alkenes and ynamides
作者:Karine Villeneuve、Nicole Riddell、William Tam
DOI:10.1016/j.tet.2005.11.081
日期:2006.4
Ruthenium-catalyzed [2+2] cycloadditionsbetweenbicyclicalkenes and ynamides were investigated. The ynamide moiety was found to be compatible with the ruthenium-catalyzedcycloaddition conditions giving the corresponding cyclobutene cycloadducts in moderate to good yields (up to 97%). Diastereoselective cycloaddition utilizing chiral cyclic ynamides were also examined and a low to moderate level
A New Route for Protected Amino Alcohols from (<i>R</i>)-Glycidol. Copper(I) Mediated Alkylation of 4-Tosyloxymethyl-2-oxazolidinone
作者:Seiji Iwama、Shigeo Katsumura
DOI:10.1246/bcsj.67.3363
日期:1994.12
(S)-4-tosyloxymethyl-2-oxazolidinone, which was synthesized from (R)-glycidol through (R)-4-benzoyloxymethyl-2-oxazolidinone, with various lithium dialkylcuprate(I)s in THF proceeded smoothly to afford the corresponding protected aminoalcohol derivatives in good yield.