62007-91-4Relevant articles and documents
1,3-dioxolan-2-ylium cations from acylfurans: Conversion of furyl ketones to esters under nonoxidative conditions
Bender, John A.,Daves, Samantha,West
, p. 2051 - 2054 (2007/10/03)
Acylfurans 3 furnished tosylated glycol monoesters 5 when treated with 1,2-diols in the presence of an equivalent of TsOH. This process likely occurs via protiodefuranation of the intermediate furyl ketals to form 1,3- dioxolan-2-ylium cations 8. Subsequent ring-opening via S(N)2 nucleophilic displacement by p-toluenesulfonate then provides esters 5. When a 1,3-diol was employed, furancontaining ester 9 was formed instead of the standard product through an apparent aldol dimerization/fragmentation pathway.