1-t-Butyl- and 1-(4-methylbenzyl)-3-bromo-3-methylazetidines were prepared from the corresponding N-(2,3-dibromo-2-methylpropylidene)alkylamines and their propensity to undergo nucleophilic substitution at the 3-position by different nucleophiles was assessed, providing a convenient access to novel 3-alkoxy-, 3-aryloxy-, 3-hydroxy-, 3-cyano-, 3-carboxy-, 3-(aminomethyl)- and 3-(hydroxymethyl)azetidines. (C) 2011 Elsevier Ltd. All rights reserved.
Novel Boronic Acid Mannich Reactions of α,α-Dichloro- and α,α,ω-Trichloroaldehydes with Arylboronic Acids
作者:Kourosch Abbaspour Tehrani、Sara Stas
DOI:10.1055/s-2007-965880
日期:2007.2
A novel variation of the boronicacid Mannich (BAM) reaction is described, in which α,α-dichloro- and α,α,ω-trichloroal-dehydes, morpholine, and arylboronicacids are used. During this one-pot reaction in refluxing toluene, 1 -phenyl- 1-morpholinoalkan-2-ones form in moderate yields. The dichloromethylene group is formally converted into a ketone functionality and as such acts as a masked carbonyl