A Convenient Synthesis of Diversely Substituted N,N-Dimethyl-4-oxo-2-(E)-alkenamides
摘要:
An efficient synthesis of diversely substituted N,N-dimethyl-4-oxo-2-(E)-alkenamides is reported. These derivatives were obtained in three steps from 1,4-benzodioxin with fair to good yields.
Synthesis of 1,3-dienes bearing both electron-donor and acceptor substituents
摘要:
Allylic benzodioxinic alcohols were prepared from 1,4-benzodioxin and then submitted to the orthoester Claisen rearrangement and Eschenmoser procedure leading to 3-substituted-2-alkylidene-1,4-benzodioxans. Di-and trisubstituted 1,3-dienes bearing both electron-donor and acceptor substituents were obtained in good yields from these compounds.