Potassium Carbonate Promoted Nucleophilic Addition of Alkenes with Phosphites
作者:Shengmei Guo、Zhenjun Huang、Wei Liu、Sen Li、Yutian Yang、Hu Cai
DOI:10.1055/s-0040-1707852
日期:2020.8
A facile hydrophosphonylation of alkenes by phosphites promoted by potassium carbonate was developed. The reaction features include easy handling, environmental friendliness, and avoidance of the use of strong bases. A variety of alkenes are tolerated in this reaction, with moderate to excellent yields.
Me 3 P-catalyzed addition of hydrogen phosphoryl compounds P(O)H to electron-deficient alkenes: 1 to 1 vs 1 to 2 adducts
作者:Tian-Zeng Huang、Tieqiao Chen、Yuta Saga、Li-Biao Han
DOI:10.1016/j.tet.2017.10.070
日期:2017.12
Trimethyl phosphine was used as an efficient catalyst for the addition of P(O)-H compounds to electron-deficient alkenes. The addition reactions were generally conducted using a catalytic amount of Me3P under mild reaction conditions. Both 1 to 1 and 1 to 2 adducts were obtained.
Facile Preparation of (Phosphorylalkyl)-Functionalized Cyclopropanols and Cyclopropylamines
作者:Harald Winsel、Vesta Gazizova、Oleg Kulinkovich、Valeriy Pavlov、Armin de Meijere
DOI:10.1055/s-1999-2972
日期:1999.12
The reactions of esters 1 and dialkylamides 8 of 3-phosphorylpropionic acids with Grignard reagents 6 in the presence of titanium tetraisopropoxide 5 or methyltitanium triisopropoxide 11 give 1-substituted and 1,2-disubstituted phosphorylated cyclopropanols 7 and cyclopropylamines 12 in moderate to very good yields (37-71 and 39-86%, respectively). These useful transformations convincingly demonstrate
Tributylphosphine catalyzed addition of diphenylphosphine oxide to unsubstituted and substituted electron-deficient alkenes
作者:Alexey V. Salin、Anton V. Il'in、Rustem I. Faskhutdinov、Vladimir I. Galkin、Daut R. Islamov、Olga N. Kataeva
DOI:10.1016/j.tetlet.2018.03.040
日期:2018.4
The PBu3-catalyzed conjugate addition of diphenylphosphine oxide to unsubstituted and substituted electron-deficient alkenes is reported. β-Substituted α,β-unsaturated esters, trans-methyl crotonate and trans-methyl cinnamate, known for their reluctance to participate in phosphine-catalyzed transformations, also react well under the developed conditions. Mild reaction conditions, simple work-up and
Hydrophosphination of Activated Alkenes by a Cobalt(I) Pincer Complex
作者:Roberto Nolla‐Saltiel、Ana M. Geer、Laurence J. Taylor、Olivia Churchill、E. Stephen Davies、William Lewis、Alexander J. Blake、Deborah L. Kays
DOI:10.1002/adsc.202000514
日期:2020.8.4
Herein we report the synthesis of three heteroleptic first‐row transitionmetal(II) complexes containing carbazolido NNN pincer ligands and conversion to the corresponding metal(I)‐carbonyl complexes via a reductive carbonylation route. These complexes are precatalysts for the hydrophosphination of activated alkenes, affording a cobalt‐catalysed hydrophosphination process that solely and selectively