MODIFIED BOROHYDRIDE AGENTS, BIS (TRIPHENYLPHOSPHINE) (TETRA-HYDROBORATO)ZINC COMPLEX [Zn(BH<sub>4</sub> <sub>2</sub>(PPh<sub>3</sub>)<sub>2</sub>] AND (TRIPHENYLPHOSPHINE) (TETRAHYDROBORATO)ZINC COMPLEX [Zn(BH<sub>4</sub>)<sub>2</sub>(PPh<sub>3</sub>)]. NEW LIGAND METAL BOROHYDRIDES AS STABLE, EFFICIENT, AND VERSATILE REDUCING AGENTS
作者:Habib Firouzabadi、Mina Adibi、Mahboobeh Ghadami
DOI:10.1080/10426509808029675
日期:1998.11.1
corresponding mines and amides are described. Bis(triphenylphosphine)(tetrahydroboratro)zinc complex shows promising shelf stability and is much more stable than its mono triphenylphosphine analogue. The reducing ability of the two complexes is more or less the same.
Modified Borohydride Agents; Efficient Reduction of Azides with (1,4-Diazabicyclo[2.2.2]octane) (Tetrahydroborato)zinc Complex [Zn(BH<sub>4</sub>)<sub>2</sub>(dabco)] and Methyltriphenylphosphonium Tetrahydroborate [MePh<sub>3</sub>P<sup>+</sup>BH<sub>4</sub><sup>−</sup>]
作者:H. Firouzabadi、M. Adibi、B. Zeynizadeh
DOI:10.1080/00397919808005968
日期:1998.4
Abstract (1,4-Diazabicyclo[2.2.2]octane)(tetrahydroborato)zinc complex and methyltriphenylphosphonium tetrahydroborate are stable modified borohydrides which are used for the efficient reduction of aryl, alkyl, and aroyl azides with excellent yields in THF or CH2Cl2 at room temperature or under reflux conditions.
BUTYLTRIPHENYLPHOSPHONIUM TETRAHYDROBORATE (BTPPTB) AS A SELECTIVE REDUCING AGENT FOR REDUCTION OF ORGANIC COMPOUNDS
作者:Abdol Reza Hajipour、Shadpour E. Mallakpour
DOI:10.1081/scc-100104001
日期:2001.1.1
Butyltriphenylphosphonium tetraborate (BTPPTB) (1) has been found to be a selective and versatile reducing agent. The reagent in dichloromethane solution or under solvent-free conditions is very useful for reduction of aldehydes, ketones, carboxylic acid chlorides, aryl azides, and aroyl azides to the corresponding alcohols, amines and amides, respectively.
METHYLTRIPHENYLPHOSPHONIUM TETRAHYDROBORATE (MePh<sub>3</sub>PBH<sub>4</sub>). A STABLE, SELECTIVE AND VERSATILE REDUCING AGENT
作者:Habib Firouzabadi、Mina Adibi
DOI:10.1080/10426509808029672
日期:1998.11.1
stable quaternary phosphonium borohydride is introduced. This compound is able to reduce aldehydes, ketones, acylchlorides, and azides efficiently in CH2Cl2 αβ-Unsaturated carbonyl compounds are reduced selectively via 1,2-reduction. The effect of Lewis acids upon the mode and the rate of the reaction of epoxides and acetophenone are also described. This reagent is also able to bring about reductions effectively
with aromatic azides in the presence of the salophen Schiff base ligand afforded new derivatives of 1,2,3‐triazole‐based quinazoline scaffold in high‐to‐excellent reaction yields. The main advantage of this procedure is that the toxicity of the copper catalyst used could be decreased to 2 mol% by complexation with the salophen ligand. All the synthesized compounds were screened for their in vitro antibacterial