586952-21-8Relevant articles and documents
Stereoselective synthesis of trans-4,5-disubstituted oxazolidin-2-ones by intramolecular conjugate addition of N-p-toluenesulfonyl carbamates
Ciclosi, Marco,Fava, Cristiana,Galeazzi, Roberta,Orena, Mario,Sepúlveda-Arques, José,González-Rosende, Maria Eugenia
, p. 1173 - 1183 (2007/10/03)
p-Toluenesulfonyl carbamates (2a-d) were prepared starting from allylic alcohols (3), in which the double bond is conjugated with an electron withdrawing group. In the presence of a catalytic amount of DBU, an intramolecular cyclisation occurred, leading