Synthesis of a new analogue of BINOL based on a homodimer of substituted 1-hydroxypyrazole
作者:Øystein Rist、Mikael Begtrup
DOI:10.1039/b010126p
日期:——
A new potential ligand for asymmetric synthesis, based on a homodimer of 1-hydroxypyrazole, has been synthesized. The chemistry involved lithiation, iodine–magnesium exchange, magnesium–zinc exchange, and cross-coupling reactions. In a preliminary study, the chemical activity of the ligand as a titanium(IV) complex was investigated in the addition of diethyl zinc to benzaldehyde. Its activity was comparable to the corresponding BINOL–Ti(IV) complex.
一种基于1-羟基吡唑的同源二聚体的新型潜在配体已被合成。该化学反应涉及锂化、碘-镁交换、镁-锌交换和交叉耦合反应。在初步研究中,探讨了该配体作为钛(IV)络合物在二乙基锌与苯甲醛加成反应中的化学活性。其活性与相应的BINOL-Ti(IV)络合物相当。