A Copper(II)-Mediated Regioselective Cyclization−Acetoxylation of 6,8-Dien-1-ones for the Synthesis of Functionalized Cyclopentanes

This paper describes a copper(II) acetate-mediated cyclization−acetoxylation of 6,8-dien-1-ones in the presence of sodium acetate as base. A variety of functionalized cyclopentanes containing synthetic useful allylic alcohol moieties with three contiguous stereogenic centers were synthesized in moderate to good yields with moderate to high regioselectivities

A Copper(II)-Mediated Regioselective Cyclization−Acetoxylation of 6,8-Dien-1-ones for the Synthesis of Functionalized Cyclopentanes

This paper describes a copper(II) acetate-mediated cyclization−acetoxylation of 6,8-dien-1-ones in the presence of sodium acetate as base. A variety of functionalized cyclopentanes containing synthetic useful allylic alcohol moieties with three contiguous stereogenic centers were synthesized in moderate to good yields with moderate to high regioselectivities

Vicinal-Diamine-Based Chiral Chain Dienes as Ligands for Rhodium(I)-Catalyzed Highly Enantioselective Conjugated Additions

A variety of readily accessible vicinal-diamine-based chiral chain dienes were successfully synthesized and utilized as steering ligands for rhodium-catalyzed conjugated additions of organoboronic acids to α,β-unsaturated carbonyl compounds to afford the desired adducts in good to excellent yields and ee’s

Kinetic Resolution of Hindered Morita–Baylis–Hillman Adducts by Rh(I)-Catalyzed Asymmetric 1,4-Addition/β-Hydroxyelimination

A kinetic resolution of hindered Morita–Baylis–Hillman adducts has been successfully achieved in excellent selectivities via Rh(I)-catalyzed asymmetric 1,4-addition/β-hydroxyelimination with the use of a chiral sulfinamide/olefin hybrid ligand. This study provides a novel and efficient access to both optically active hindered highly functionalized alkenes and Morita–Baylis–Hillman adducts

Kinetic Resolution of Hindered Morita–Baylis–Hillman Adducts by Rh(I)-Catalyzed Asymmetric 1,4-Addition/β-Hydroxyelimination

A kinetic resolution of hindered Morita–Baylis–Hillman adducts has been successfully achieved in excellent selectivities via Rh(I)-catalyzed asymmetric 1,4-addition/β-hydroxyelimination with the use of a chiral sulfinamide/olefin hybrid ligand. This study provides a novel and efficient access to both optically active hindered highly functionalized alkenes and Morita–Baylis–Hillman adducts

Vicinal-Diamine-Based Chiral Chain Dienes as Ligands for Rhodium(I)-Catalyzed Highly Enantioselective Conjugated Additions

A variety of readily accessible vicinal-diamine-based chiral chain dienes were successfully synthesized and utilized as steering ligands for rhodium-catalyzed conjugated additions of organoboronic acids to α,β-unsaturated carbonyl compounds to afford the desired adducts in good to excellent yields and ee’s

Synthesis and Evaluation of 5,5′-Bitetralone-Based Chiral Phosphoric Acids

A new type of phosphoric acid bearing a 5,5′-bitetralone scaffold was synthesized from BINOL and was shown to be a highly effective catalyst as illustrated in the asymmetric transfer hydrogenation of 2-phenyl­quinoline and the Friedel–Crafts reaction of 2,2,2-trifluoro­acetophenone

Supplementary document for CO2-based hollow-core fiber Raman laser with high-pulse energy at 1.95 µm - 5453097.pdf

Supplemental Documen

<i>E</i>₁(<i>m</i>)~<i>m</i> and <i>E</i>₂(<i>m</i>)~<i>m</i> curves for the observed displacement data series of the PL13-2.

E1(m)~m and E2(m)~m curves for the observed displacement data series of the PL13-2.</p

CO2-based hollow-core fiber Raman laser with high-pulse energy at 1.95 um

In this letter, we present a high pulse energy Raman laser at 1946 nm wavelength directly pumped with a 1533 nm custom-made fiber laser. The Raman laser is based on the stimulated Raman scattering (SRS) in an 8-meter carbon dioxide (CO2) filled nested anti-resonant hollow-core fiber (ARHCF). The low energy phonon emission combined with the inherent SRS process along the low-loss fiber allows the generation of high pulse energy up to 15.4 {\mu}J at atmospheric CO2 pressure. The Raman laser exhibits good long-term stability and low relative intensity noise (RIN) of less than 4%. We also investigate the pressure-dependent overlap of the Raman laser line with the absorption band of CO2 at 2 {\mu}m spectral range. Our results constitute a novel and promising technology towards high energy 2 {\mu}m lasers