Darstellung und Eigenschaften von und Reaktionen mit metallhaltigen Heterocyclen, XI¹⁾ Darstellung und Eigenschaften von Ethandiyl‐, Propandiyl‐, Pentandiyl‐ und Decandiyl‐bis(trifluormethansulfonat)

Abstract

Preparation and Properties of, and Reactions with, Metal‐Containing Heterocycles, XI 1) Preparation and Properties of Ethanediyl‐, Propanediyl‐, Pentanediyl‐, and Decanediyl Bis(trifluoromethanesulfonate) The alkanediyl bis(trifluoromethanesulfonates) CF 3 SO 2 OCH 2  [CR 2 ] n  CH 2 OO 2 SCF 3 ( 1 , 2 , 2 ′, 3 , 4 ) are obtained from the diols HOCH 3  [CR 2 ] n  CH 2 OH with (CF 3 SO 2 ) 2 O in the presence of pyridine [R = H:n = 0( 1 ), 1( 2 ), 8( 4 ); R = CH 3 :n = 1( 2 )]. and from tetrahydro‐2 H ‐pyran with (CH 3 SOP 2 ) 2 O [R = H:n = 3( 3 )], respectively. The instability of 2 can be traced back to a dipolar interaction between the protons and the CF 3 SO 3 residues attached to the 1,3‐carbon atoms.