A novel and facile synthesis of dienals and substituted 2H-pyrans via the Vilsmeier reaction of alpha-oxo-ketenedithioacetals.
A novel and facile synthesis of dienals (3a, 3b) and substituted 2H-pyrans (4c, 4d) from a series of [small alpha]-oxo ketenedithioacetals containing a methyl group adjacent to the carbonyl group (1a-d)via the Vilsmeier reaction has been developed and a mechanism for the reactions has been proposed.
Liu
Yingchun
Y
Department of Chemistry, Northeast Normal University, Changchun, 130024, P. R. China.
Dong
Dewen
D
Liu
Qun
Q
Qi
Yimei
Y
Wang
Zuo
Z