Use of trichloroacetonitrile as a hydrogen chloride generator for ring-opening reactions of aziridines
作者:Yasunori Toda、Riki Matsuda、Shuto Gomyou、Hiroyuki Suga
DOI:10.1039/c9ob00602h
日期:——
Regioselective ring-opening reactions of 2-aryl-N-tosylaziridines are described, in which hydrogenchloride is generated by photodegradation of trichloroacetonitrile. HCl adducts are obtained in high yields in 1,4-dioxane, whereas methanol adducts are predominantly obtained in methanol. Trichloroacetonitrile can serve as a photoresponsive molecular storage generator for hydrogenchloride.
BF<sub>3</sub>·OEt<sub>2</sub>-Mediated Highly Regioselective S<sub>N</sub>2-Type Ring-Opening of <i>N</i>-Activated Aziridines and <i>N</i>-Activated Azetidines by Tetraalkylammonium Halides
作者:Manas K. Ghorai、Amit Kumar、Deo Prakash Tiwari
DOI:10.1021/jo902244y
日期:2010.1.1
A highly regioselective Lewis acid-mediated S(N)2-type ring-opening of N-sulfonylaziridines and azetidines with tetraalkylammonium halides in CH2Cl2 solution to afford 1,2- and 1,3-haloamines in excellent yields is described. An easy diastereoselective route toward substituted chiral N-tosylaziridines has been developed. The mechanism of ring-opening via S(N)2 pathway has been confirmed by the formation of chiral haloamines with excellent er and dr. Chloroamines obtained from 2,3-disubstituted aziridines were converted to the chiral N-tosylamines via radical dehalogenation.