Stereoselective Synthesis of Dienes from N-Allylhydrazones
摘要:
A new method for the stereoselective synthesis of dienes from aldehydes and N-allylhydrazine derivatives has been developed. High levels of (E)-stereoselectivity are obtained for a variety of substrates. Addition of a dienophile to the reaction mixture allows a one-flask diene synthesis-cycloaddition sequence.
Ligand-Free Iron-Catalyzed Carbon(sp<sup>2</sup>)–Carbon(sp<sup>2</sup>) Cross-Coupling of Alkenyllithium with Vinyl Halides
作者:Qiang Liu、Zhi-Yong Wang、Xiao-Shui Peng、Henry N. C. Wong
DOI:10.1021/acs.joc.8b00510
日期:2018.6.15
An efficient ligand-free iron-catalyzedcross-couplingreaction involving alkenyllithium and vinyl iodides was developed to form diene species in moderate to good yields. This new iron-catalyzedcross-couplingreaction provides a mild, inexpensive, and environmentally friendly avenue toward synthesis of diversified diene derivatives.