Catalyst-Free and Selective C–N Bond Functionalization: Stereospecific Three-Component Coupling of Amines, Dichloromethane, and >P(O)H Species Affording α-Aminophosphorus Compounds
作者:Yalei Zhao、Xiuling Chen、Tieqiao Chen、Yongbo Zhou、Shuang-Feng Yin、Li-Biao Han
DOI:10.1021/jo501961h
日期:2015.1.2
and selective C–N bond functionalization has been achieved through three-component coupling of amines, dihalomethane, and >P(O)H species. This reaction takes place stereospecifically with retention of configuration at phosphorus, which can produce various new opticallyactive phosphorus analogues of α-amino acids.
Hydrophosphorylation of Alkynes Catalyzed by Palladium: Generality and Mechanism
作者:Tieqiao Chen、Chang-Qiu Zhao、Li-Biao Han
DOI:10.1021/jacs.8b00550
日期:2018.2.28
H-phosphonates disfavored the addition. For H-phosphinates and secondary phosphine oxides, Pd/dppe/Ph2P(O)OH was the catalyst of choice, which led to highly regioselective formation of the Markovnikov adducts. By using Pd(PPh3)4 as the catalyst, hypophosphinic acid added to terminal alkynes to give the corresponding Markovnikov adducts. Phosphinic acids, phosphonic acid, and its monoester were not applicable
An efficient base-catalyzed double addition of H-phosphine oxides to alkynes
作者:Aya Yoshimura、Yuta Saga、Yuki Sato、Akiya Ogawa、Tieqiao Chen、Li-Biao Han
DOI:10.1016/j.tetlet.2016.06.079
日期:2016.7
An efficient base-catalyzed double addition of H-phosphine oxides to alkynes is developed. In the presence of a catalytic amount of a base, the addition of various H-phosphine oxides to both aromatic and aliphatic alkynes took place efficiently to produce the corresponding bisphosphoryl compounds in excellent yields. This method provides an easy direct way to prepare bisphosphine oxides that are of
Highly Selective 1,4- and 1,6-Addition of P(O)H Compounds to<i>p</i>-Quinones: A Divergent Method for the Synthesis of<i>C</i>- and<i>O</i>-Phosphoryl Hydroquinone Derivatives
作者:Biquan Xiong、Ruwei Shen、Midori Goto、Shuang-Feng Yin、Li-Biao Han
DOI:10.1002/chem.201202074
日期:2012.12.21
functionality. Further studies on these reactions by using opticallyactiveH‐phosphinates showed that all addition reactions took place stereospecifically with retention of configuration at the phosphorus center. The findings lead to the establishment of a divergent method for the synthesis of C‐ and O‐phosphoryl hydroquinone derivatives from easily available P(O)H compounds.