Помогите ознакомиться со статьей:
Obydennov, Dmitrii L.; Roeschenthaler, Gerd-Volker; Sosnovskikh, Vyacheslav Ya., "An improved synthesis and some reactions of diethyl 4-oxo-4H-pyran-2,5- dicarboxylate", Tetrahedron Letters, 2013 , vol. 54, # 48 p. 6545 - 6548.
- DOI:
http://dx.doi.org/10.1016/j.tetlet.2013.09.100
