Isolation, Structural Characterization, and Synthetic Application of Oxycyclopentadienyl Dianions
作者:Lantao Liu、Wen-Xiong Zhang、Chao Wang、Congyang Wang、Zhenfeng Xi
DOI:10.1002/anie.200904298
日期:2009.10.12
A new building block? Lithium complexes of novel oxycyclopentadienyldianions were isolated in high yield and characterized by X‐ray crystallography. Cyclopentadienes and transition‐metal complexes could be prepared from these intriguing intermediates (see scheme).
Diazo Compounds as Electrophiles To React with 1,4-Dilithio-1,3-dienes: Efficient Synthesis of 1-Imino-pyrrole Derivatives
作者:Ming Zhan、Shaoguang Zhang、Wen-Xiong Zhang、Zhenfeng Xi
DOI:10.1021/ol401878q
日期:2013.8.16
1-Imino-pyrrole and indole derivatives were synthesized in high yields from the reaction of diaryl diazomethanes with 1,4-dilithio-1,3-dienes. Diaryl diazomethanes reacted as electrophiles in this reaction. An unprecedented Zn-complex was formed via transmetalation of the above reaction intermediate with ZnCl2 and was structurally characterized. The trans-mu(2)-eta(1):eta(1) coordination mode in the solid state for this azaallylzinc compound was observed.
Isolation and X-ray Structure of a Trimeric 1,4-Dilithio-1,3-butadiene and a Dimeric Me<sub>3</sub>Si-Substituted 1,4-Dilithio-1,3-butadiene
作者:Lantao Liu、Wen-Xiong Zhang、Qian Luo、Heng Li、Zhenfeng Xi
DOI:10.1021/om900872u
日期:2010.1.11
The X-ray crystallographic structures of a trimeric all-alkyl-substituted 1,4-(dilithio-1,3-butadiene with a Li-6 pseudooctahedron and a dimeric Me3Si-substituted 1,4-dilahio-1,3-butadiene with a Li-4 tetrahedron are reported. The reactions of theses compounds with CO were investigated.