Pd-catalyzed functionalization of 1,3-enynes via alkylene-π-allylpalladium intermediates DOI Creative Commons
Long Li, Shan Wang, Ajay Jakhar

et al.

Green Synthesis and Catalysis, Journal Year: 2022, Volume and Issue: 4(2), P. 124 - 134

Published: Dec. 15, 2022

In recent years, the concept of transition metal-catalyzed functionalization unsaturated hydrocarbons has emerged as a promising strategy for developing new and valuable reactions, attracted considerable attention because it is efficient atomic economical. this critical review, we describe advances that have been made in development 1,3-enynes via alkylene-π-allylpalladium intermediates.

Language: Английский

Palladium-catalyzed asymmetric hydrophosphination of internal alkynes: Atroposelective access to phosphine-functionalized olefins DOI Creative Commons

Danqing Ji,

Jierui Jing,

Yi Wang

et al.

Chem, Journal Year: 2022, Volume and Issue: 8(12), P. 3346 - 3362

Published: Sept. 23, 2022

Language: Английский

Citations

79

Catalytic Asymmetric Hydroalkoxylation and Formal Hydration and Hydroaminoxylation of Conjugated Dienes DOI

Shao‐Qian Yang,

Aijun Han, Yang Liu

et al.

Journal of the American Chemical Society, Journal Year: 2023, Volume and Issue: 145(7), P. 3915 - 3925

Published: Feb. 10, 2023

The straightforward construction of stereogenic centers bearing unprotected functional groups, as in nature, has been a persistent pursuit synthetic chemistry. Abundant applications free enantioenriched allyl alcohol and hydroxylamine motifs have made the asymmetric hydration hydroaminoxylation conjugated dienes from water hydroxylamine, respectively, intriguing efficient routes that have, however, unachievable thus far. A fundamental challenge is failure to realize transition-metal-catalyzed enantioselective C–O bond constructions via hydrofunctionalization dienes. Here, we perform comprehensive study toward stereoselective formal by synthesizing set new P,N-ligands identifying an aryl-derived oxime surrogate for both hydroxylamine. Asymmetric hydroalkoxylation with also elucidated. Furthermore, versatile derivatizations following provide indirect but concise hydrophenoxylation, hydrofluoroalkoxylation, hydrocarboxylation unreported Finally, ligand-to-ligand hydrogen transfer process proposed based on results preliminary mechanistic experiments.

Language: Английский

Citations

45

Diastereodivergent Aldol‐Type Coupling of Alkoxyallenes with Pentafluorophenyl Esters Enabled by Synergistic Palladium/Chiral Lewis Base Catalysis DOI
Minghui Zhu, Peixin Wang, Qinglong Zhang

et al.

Angewandte Chemie International Edition, Journal Year: 2022, Volume and Issue: 61(33)

Published: June 17, 2022

As a fundamental and synthetically useful C-C bond formation reaction, the aldol reaction is one of most versatile transformations in organic synthesis. However, despite extensive research on asymmetric versions unified method for stereoselective access to complementary syn anti diastereomeric products remains be developed. In this study, we developed synergistic palladium/chiral Lewis base system that overcomes inherent diastereoselectivity bias reactions and, as result, allowed us achieve first diastereodivergent coupling alkoxyallenes with pentafluorophenol esters. Computational studies suggest mechanism involving an intermolecular protonative hydropalladation pathway rather than palladium-hydride migratory insertion pathway. The origin stereochemistry catalysis rationalized by DFT calculations.

Language: Английский

Citations

65

Ni-catalyzed asymmetric hydrophosphinylation of conjugated enynes and mechanistic studies DOI Creative Commons
Yaqian Zhang,

Xue-Yu Han,

Yue Wu

et al.

Chemical Science, Journal Year: 2022, Volume and Issue: 13(14), P. 4095 - 4102

Published: Jan. 1, 2022

The catalytic asymmetric synthesis of

Language: Английский

Citations

54

Rh-Catalyzed Regio- and Enantioselective Allylic Phosphinylation DOI
Bing Li, Min Liu, Sajid Ur Rehman

et al.

Journal of the American Chemical Society, Journal Year: 2022, Volume and Issue: 144(7), P. 2893 - 2898

Published: Feb. 14, 2022

Transition-metal-catalyzed branched and enantioselective allylic substitution of monosubstituted precursors with carbon, nitrogen, oxygen, sulfur, fluoride nucleophiles has been well-established. However, such a selective carbon–phosphorus bond formation not realized probably due to the catalyst deactivation by strong coordinating nature phosphinylating reagents. Herein, we report Rh-catalyzed highly regio- synthesis phosphine oxides in presence chiral bisoxazoline-phosphine ligand. The application α-hydroxylalkylphosphine keep low concentration secondary is essential for high yields. addition diphenyl phosphoric acid was found only activate alcohols but also accelerate formation.

Language: Английский

Citations

52

Asymmetric Hydrophosphinylation of Alkynes: Facile Access to Axially Chiral Styrene‐Phosphines DOI
Baohua Cai, Yuan Cui, Jian Zhou

et al.

Angewandte Chemie International Edition, Journal Year: 2022, Volume and Issue: 62(3)

Published: Nov. 25, 2022

Abstract A Cu/CPA co‐catalytic system has been developed for achieving the direct hydrophosphinylation of alkynes with phosphine oxides in delivering novel axially chiral phosphorus‐containing alkenes high yields and excellent enantioselectivities (up to 99 % yield ee). DFT calculations were performed elucidate reaction pathway origin enantiocontrol. This streamlined modular methodology establishes a new platform design application styrene‐phosphine ligands.

Language: Английский

Citations

49

Synthesis of P-stereogenic cyclicphosphinic amidesviaelectrochemically enabled cobalt-catalyzed enantioselective C–H annulation DOI
Tao Liu,

Wangqin Zhang,

Chao Xu

et al.

Green Chemistry, Journal Year: 2023, Volume and Issue: 25(9), P. 3606 - 3614

Published: Jan. 1, 2023

We describe a cobalta-electro-catalyzed enantioselective C–H annulation of arylphosphinamides with alkynes for P-stereogenic compounds via desymmetrization and kinetic resolution processes.

Language: Английский

Citations

40

Palladium‐Catalyzed Enantio‐ and Regioselective Ring‐Opening Hydrophosphinylation of Methylenecyclopropanes DOI Creative Commons
Jian Zhou, Ling Meng, Shujuan Lin

et al.

Angewandte Chemie International Edition, Journal Year: 2023, Volume and Issue: 62(26)

Published: April 26, 2023

Transition metal-catalyzed hydrofunctionalization of methylenecyclopropanes (MCPs) has presented a considerable challenge due to the difficult manipulation regioselectivity and complicated reaction patterns. Herein, we report straightforward Pd-catalyzed ring-opening hydrophosphinylation MCPs via highly selective C-C bond cleavage. This method allows for rapid efficient access wide range chiral allylic phosphine oxides in good yields high enantioselectivities. Additionally, density functional theory (DFT) calculations were performed elucidate mechanism origin enantioselectivity.

Language: Английский

Citations

33

Enantioselective copper-catalyzed hydrophosphination of alkenyl isoquinolines DOI Creative Commons
Qingjing Yang, Jian Zhou, Jun Wang

et al.

Chemical Science, Journal Year: 2023, Volume and Issue: 14(16), P. 4413 - 4417

Published: Jan. 1, 2023

An enantioselective hydrophosphination of alkenyl isoquinolines is developed by using a copper-chiral diphosphine ligand catalyst. It provides direct and atom-efficient approach to prepare variety chiral phosphines with an isoquinoline unit in good yields high enantioselectivities. In addition, these phosphine products are useful bidentate P,N-ligands which showed potential application asymmetric catalysis.

Language: Английский

Citations

27

Copper‐Phosphido Catalysis: Enantioselective Addition of Phosphines to Cyclopropenes** DOI

Brian S. Daniels,

Xintong Hou,

Stephanie A. Corio

et al.

Angewandte Chemie International Edition, Journal Year: 2023, Volume and Issue: 62(36)

Published: June 19, 2023

We describe a copper catalyst that promotes the addition of phosphines to cyclopropenes at ambient temperature. A range cyclopropylphosphines bearing different steric and electronic properties can now be accessed in high yields enantioselectivities. Enrichment phosphorus stereocenters is also demonstrated via Dynamic Kinetic Asymmetric Transformation (DyKAT) process. combined experimental theoretical mechanistic study supports an elementary step featuring insertion Cu

Language: Английский

Citations

25