Synthesis of Macrocyclic Amides Using Manganese(III)- Based Intramolecular Cyclization of N-(ω-Alkenyl)-3- oxobutanamides
作者:Yosuke Ito、Hiroshi Nishino
DOI:10.1515/hc.2009.15.6.467
日期:2009.1
The temperature under an argon atmosphere resulted in the oxidative intramolecular radical cyclization that produced The reaction of N-(omega-alkenyl)-3-oxobutanamides with manganese(III) acetate in glacial acetic acid at reflux bicyclomacrocyclic amides in moderate to good yields.
Manganese(III)-Assisted Specific Intramolecular Addition
3-oxobutanamides underwent manganese(III)-mediated oxidative intramolecular addition to produce dihydrofuran-fused macrolides and macrocyclic amides from 8 to 26 members. A similar reaction of the oligooxamethylene-tethered ω-alkenyl 3-oxobutanoates also gave dihydrofuran-fused crown ether type macrolides which had a phase-transfer ability with sodium and potassium picrates. The manganese(III)-assisted specific