Aqua-aminoorganoboron Catalyst: Engineering Single Water Molecule to Act as an Acid Catalyst in Nitro Aldol Reaction
作者:Junichi Yoshimoto、Christian A. Sandoval、Susumu Saito
DOI:10.1246/cl.2008.1294
日期:2008.12.5
We have disclosed the catalytic potential hidden behind a series of aqua-aminoorganoboron compounds in the formation and reaction of nitronate species. The pivotal role of a single-coordinated water molecule in the catalyst was demonstrated by comparison with the D2O-analogue. The present results provide a new strategy for the design of metal-free catalysts which function via elaborative hydrogen-bonding networks involving water.
LaCl<sub>3</sub> · 7H<sub>2</sub>O‐Promoted Regioselective Ring Opening of Epoxides Using NaNO<sub>2</sub>in Ether–Water System: A Facile Synthesis of 2‐Nitroalcohols
作者:Jagat C. Borah、Siddhartha Gogoi、Joshodeep Boruwa、Nabin C. Barua
DOI:10.1081/scc-200051043
日期:2005.3
Abstract A convenient and efficient synthesis of 2‐nitroalcohols has been achieved by regioselective ringopening of epoxides using LaCl3 · 7H2O and NaNO2 in ether–H2O system at room temperature. The reaction afforded the corresponding products in good to excellent yields under mild conditions.