88191-39-3Relevant academic research and scientific papers
Sustainable System for Hydrogenation Exploiting Energy Derived from Solar Light
Ishida, Naoki,Kamae, Yoshiki,Ishizu, Keigo,Kamino, Yuka,Naruse, Hiroshi,Murakami, Masahiro
supporting information, p. 2217 - 2220 (2021/02/16)
Herein described is a sustainable system for hydrogenation that uses solar light as the ultimate source of energy. The system consists of two steps. Solar energy is captured and chemically stored in the first step; exposure of a solution of azaxanthone in ethanol to solar light causes an energy storing dimerization of the ketone to produce a sterically strained 1,2-diol. In the second step, the chemical energy stored in the vicinal diol is released and used for hydrogenation; the diol offers hydrogen onto alkenes and splits back to azaxanthone, which is easily recovered and reused repeatedly for capturing solar energy.
A convenient titanium-mediated intermolecular alkyne-carbonate coupling reaction
Wolan, Andrzej,Cadoret, Frédéric,Six, Yvan
experimental part, p. 7429 - 7439 (2009/12/06)
A direct diastereoselective titanium-mediated intermolecular coupling of internal alkynes with dialkyl carbonates under Kulinkovich-type reaction conditions is presented. The influence of the structures of the coupling partners on the yields and regioselectivities of this transformation is described.
Highly selective hydrogenation of multiple carbon-carbon bonds promoted by nickel(0) nanoparticles
Alonso, Francisco,Osante, I?aki,Yus, Miguel
, p. 93 - 102 (2007/10/03)
A new method for the highly stereoselective cis semihydrogenation of internal alkynes, semihydrogenation of terminal alkynes, reduction of dienes to alkenes, and reduction of alkynes and alkenes to alkanes is described based on in situ generated both Ni(0) nanoparticles and molecular hydrogen.
Highly stereoselective semihydrogenation of alkynes promoted by nickel(0) nanoparticles
Alonso, Francisco,Osante, Inaki,Yus, Miguel
, p. 305 - 308 (2007/10/03)
A new method for the highly stereoselective cis-semihydrogenation of internal alkynes is described based on in situ generated Ni(0) nanoparticles and molecular hydrogen. This reduction system also allows the semihydrogenation of terminal alkynes.
Regiochemical control of the ring opening of 1:2-epoxides by means of chelating processes. 10. Synthesis and ring opening reactions of mono- and difunctionalized cis and trans aliphatic oxirane systems
Azzena, Francesca,Calvani, Federico,Crotti, Paolo,Gardelli, Cristina,Macchia, Franco,Pineschi, Mauro
, p. 10601 - 10626 (2007/10/02)
The regiochemical outcome of the ring opening of 1:2-epoxides through chelation processes assisted by metal ions, was verified in mono- and difunctionalized aliphatic oxirane systems bearing the heterofunctionality (OR) in an homoallylic and/or allylic relationship to the oxirane ring. The effect of the distance of the OR functionality from the oxirane ring and of the type of protective group on the regiochemical outcome of these systems is examined. In some cases, the use of LiClO4 or Mg(ClO4)2 as the promoting metal salt makes it possible the obtainment of a nice regioalternating process.
A Practical Synthesis of Several Polyhydroxylated Chiral Building Blocks
Kusakabe, Masato,Kato, Hiroshi,Sato, Fumie
, p. 2163 - 2166 (2007/10/02)
A practical method for the synthesis of several useful polyhydroxylated chiral building blocks has been developed.The key reaction is the kinetic resolution of (E)-1-trimethylsilyl-4-alkoxy-1-buten-3-ol or (E)-1-trimethylsilyl-5-alkoxy-1-penten-3-ol using the Sharpless asymmetric epoxidation reaction.
