A novel chalcogen-mediated metal-free oxyfunctionalization mode of ynamides for the synthesis of α-chalcogenyl acrylamides has been developed.
一种新颖的硒介导的无金属氧官能化模式已被开发用于合成α-硒基丙烯酰胺。
Regio- and Stereoselective Hydrophosphorylation of Ynamides for the Synthesis of β-Aminovinylphosphine Oxides
作者:Hai Huang、Hongjun Zhu、Jun Yong Kang
DOI:10.1021/acs.orglett.8b01065
日期:2018.5.4
A metal-free hydrophosphorylation of ynamides with diaryl phosphine oxides has been developed. A highly E-selective and β-regioselective hydrophosphorylation protocol has been established as a general method for the synthesis of diversely hydrophosphinylated products employing an in situ generated electrophilic phosphorus species. Deuterium incorporation experiments suggest that the amino phosphirenium
With Et3N·3HF as the fluorinating reagent, a copper(I)- or silver(I)-catalyzed β/α-site-regiocontrolled trans-hydrofluorination of alkynamides has been achieved, affording the corresponding fluoro enamides in moderate to nearly quantitative yields with high regio- and stereoselectivity, respectively. The reaction proceeds under mild reaction conditions and exhibits good functional group tolerance.
Electrophilic fluorination of stereodefined disubstituted silyl ketene hemiaminals <i>en route</i> to tertiary α-fluorinated carbonyl derivatives
作者:Jian Qiang Huang、Zackaria Nairoukh、Ilan Marek
DOI:10.1039/c8ob00067k
日期:——
A highly diastereoselective synthesis of tertiary α-fluoro carbonyl compounds is reported in only two chemical steps from a simple alkyne through the reaction of stereodefined fully substituted silyl ketene hemiaminal derivatives with Selectfluor.
Electrophilic Oxidation of Stereodefined Polysubstituted Silyl Ketone Aminals
作者:Jian Qiang Huang、Zackaria Nairoukh、Ilan Marek
DOI:10.1002/ejoc.201701516
日期:2018.2.7
derivatives with excellent diastereoselectivity through a combined carbometalation‐oxidation‐silylation of alkynes followed by a second oxidation reaction of the resulting stereodefined polysubstituted silylketone aminals.