Total Synthesis of Polyene Natural Product Dihydroxerulin by Mild Organocatalyzed Dehydrogenation of Alcohols
作者:Hexin Xie、Shilei Zhang、Hao Li、Xinshuai Zhang、Sihan Zhao、Zian Xu、Xixi Song、Xinhong Yu、Wei Wang
DOI:10.1002/chem.201103325
日期:2012.2.20
Polyene synthesis: An efficient approach to the total synthesis of polyene naturalproduct dihydroxrulin (1) is described. A novel, mild, direct organocatalytic IBX‐mediated dehydrogenation process of simple alcohols to enals has been developed, which serves as a key step in the synthesis (see scheme).
The CH Activation/1,3-Diyne Strategy: Highly Selective Direct Synthesis of Diverse Bisheterocycles by Rh<sup>III</sup>Catalysis
作者:Da-Gang Yu、Francisco de Azambuja、Tobias Gensch、Constantin G. Daniliuc、Frank Glorius
DOI:10.1002/anie.201403782
日期:2014.9.1
The reactivity and selectivity of 1,3‐diynes in transition‐metal‐catalyzed CH activation is exploited to quickly assemble diverse polysubstituted bisheterocycles, which are highly important but difficult to access. By using the CH activation/1,3‐diyne strategy, we overcame the challenges of selectivity (chemo‐, regio‐, and mono‐/diannulation) and constructed seven kinds of adjacent bisheterocycles
Copper-Catalyzed Cross-Coupling Reactions of Bromoalkynols with Terminal Alkynes in Supercritical Carbon Dioxide
作者:Huan-Feng Jiang、A-Zhong Wang
DOI:10.1055/s-2007-966058
日期:2007.6
Copper-catalyzed cross-coupling reactions of bromo-alkynols and terminal alkynes were carried out in supercritical carbondioxide (scCO 2 ) to afford the corresponding unsymmetrical diynes with good yields. The reaction is sensitive to temperature and the pressure of CO 2 . Methanol, as a cosolvent of scCO 2 , could promote dissolution of the inorganic salt and thus facilitated the reaction. This new heterocoupling
One‐pot synthesis of unsymmetrical 1,3‐butadiyne derivatives
作者:Zhicai Zhao
DOI:10.1002/bkcs.12762
日期:2023.10
An efficient co-operative Ni/Cu system for Cadiot–Chodkiewicz coupling utilizes CaC2 as the alkyne source. The advantage of this cross-coupling reaction lies in the low cost of using cheap and readily available raw materials and the simplicity of operation. A series of functionalized diaryl, aryl-alkyl, and aryl-heteroaryl 1,3-diynes are obtained in moderate to high yields.
The specification describes and claims methods of controlling acarine pests by application of a compound of Formula (I), methods of controlling arthropod pests by application of a compound of Formula (IA), compounds of Formula (IA) per se, pesticidal compositions comprising a compound of Formula (IA), and processes for preparing a compound of Formula (IA).