Computational Study-Led Organocatalyst Design: A Novel, Highly Active Urea-Based Catalyst for Addition Reactions to Epoxides
作者:Eimear M. Fleming、Cormac Quigley、Isabel Rozas、Stephen J. Connon
DOI:10.1021/jo702154m
日期:2008.2.1
catalyst for the promotion of addition reactions to epoxide electrophiles. Synthesis and evaluation of 6 revealed it to be a powerful catalyst for the addition of 1,2-dimethylindole to styrene oxide under conditions in which simple N,N-bis-aryl ureas and thioureas (including 1) are inactive. Subsequent studies determined 6 to be compatible with a range of indole and epoxide substrates (including (E)-stilbene
一项计算机模拟研究检查了简单硫脲催化剂与三种不同亲电试剂之间氢键配合物的稳定性,并确定了一种新型的,高活性的N-甲苯磺酰脲催化剂,可促进环氧亲电试剂的加成反应。6的合成和评估表明,它是在简单的N,N-双-芳基尿素和硫脲(包括1个)不活泼的条件下将1,2-二甲基吲哚添加到氧化苯乙烯中的有力催化剂。随后的研究确定6与多种吲哚和环氧底物(包括(E)-二氧化二苯乙烯),发现可以在温和条件下将相对较差的亲核试剂,例如空间和电子失活的苯胺,苯硫酚和苯甲醇,有效地和区域选择性地添加到环氧乙烷中。