One-Pot, Three-Component Approach to the Synthesis of 3,4,5-Trisubstituted Pyrazoles
作者:Ahmed Kamal、K. N. Visweswara Sastry、D. Chandrasekhar、Geeta Sai Mani、Praveen Reddy Adiyala、Jagadeesh Babu Nanubolu、Kiran Kumar Singarapu、Ram Awatar Maurya
DOI:10.1021/jo502946g
日期:2015.5.1
high yielding protocol for the synthesis of polyfunctional pyrazoles has been developed through one-pot, three-component coupling of aldehydes, 1,3-dicarbonyls, and diazo compounds as well as tosyl hydrazones. The reaction proceeds through a tandem Knoevenagel condensation, 1,3-dipolar cycloaddition, and transition metal-free oxidative aromatization reaction sequence utilizing molecular oxygen as a
通过醛,1,3-二羰基和重氮化合物以及甲苯磺酰基的一锅,三组分偶联,已经开发出了一种用于合成多官能吡唑的操作简单且产率高的方案。该反应通过串联Knoevenagel缩合,1,3-偶极环加成和利用分子氧作为绿色氧化剂的无过渡金属的氧化芳构化反应顺序进行。通过分别改变醛,1,3-二羰基和重氮组分来研究反应范围。