An Efficient Preparation of β-Aryl-β-ketophosphonates by the TFAA/H3PO4-Mediated Acylation of Arenes with Phosphonoacetic Acids
摘要:
[GRAPHICS]beta-Aryl-beta-ketophosphonates can be efficiently prepared in good yield by using a TFAA/85% H(3)PO(4)-mediated acylation of electron-rich arenes with phosphonoacetic acids. The conditions offer advantages over existing methods of preparing these useful compounds by not requiring the use of strong base, cryogenics, or an anhydrous and inert atmosphere. Furthermore, some functional groups not tolerated with the reaction conditions used in existing methods are compatible with the herein described conditions.
Base-Induced One-Pot Preparation of N- or P-Substituted Alkynes
作者:Yang Zhang、Yanqin Zhang、Jing Xiao、Zhihong Peng、Wanrong Dong、Delie An
DOI:10.1002/ejoc.201501092
日期:2015.12
An efficient method for the formation of C(sp)–N or C(sp)–P bonds is described. The facile transformation proceeds under mild conditions (0 or –20 °C) in a one-pot manner, and does not require transition-metal catalysts. The base-induced protocol exhibits good functional group tolerance (up to 44 examples) and high efficiency (up to 94 % yield) towards rare heteroatom-substituted acetylenes (N or P)
Mukaiyama reagent-promoted metal-free preparation of alkynyl sulfones and phosphonates under mild conditions
作者:Danyang Qi、Wanrong Dong、Zhihong Peng、Yingjun Zhang、Delie An
DOI:10.1016/j.tet.2019.06.035
日期:2019.8
An efficient and mild route for the formation sulfur or phosphor-substituted alkynes was herein demonstrated. The Mukaiyama reagent-mediated transformation started from easily-accessible substrates without carbon-carbon triple bonds, and the reaction proceeded undermildconditions (room temperature) in a one-pot manner, requiring for no transition metal-catalysts. The practical protocol featured for
An Efficient Preparation of β-Aryl-β-ketophosphonates by the TFAA/H<sub>3</sub>PO<sub>4</sub>-Mediated Acylation of Arenes with Phosphonoacetic Acids
作者:George P. Luke、Christopher K. Seekamp、Zhe-Qing Wang、Bertrand L. Chenard
DOI:10.1021/jo800973e
日期:2008.8.1
[GRAPHICS]beta-Aryl-beta-ketophosphonates can be efficiently prepared in good yield by using a TFAA/85% H(3)PO(4)-mediated acylation of electron-rich arenes with phosphonoacetic acids. The conditions offer advantages over existing methods of preparing these useful compounds by not requiring the use of strong base, cryogenics, or an anhydrous and inert atmosphere. Furthermore, some functional groups not tolerated with the reaction conditions used in existing methods are compatible with the herein described conditions.