Divergent Pathways and Competitive Mechanisms of Metathesis Reactions between 3-Arylprop-2-ynyl Esters and Aldehydes: An Experimental and Theoretical Study
作者:Cristina Trujillo、Goar Sánchez-Sanz、Ieva Karpavičienė、Ullrich Jahn、Inga Čikotienė、Lubomír Rulíšek
DOI:10.1002/chem.201402551
日期:2014.8.11
conditions, the products of these reactions can be Morita–Baylis–Hillman (MBH) adducts that are unavailable by traditional MBH reactions or E‐ and Z‐α,β‐unsaturated ketones. 18O‐Labeling studies suggested the existence of two different reaction pathways to the products. These pathways were further examined by quantum chemical calculations that employed the DFT(wB97XD)/6‐311+G(2d,p) method, together
通过BF催化3- arylprop -2-炔基酯和醛之间的反应的机理研究3 ⋅的Et 2 ö通过同位素标记实验和量子化学计算进行。反应是通过经典的炔烃-羰基复分解路线或前所未有的加成-重排级联进行的。根据起始原料的结构和反应条件,这些反应的产物可以是传统的MBH反应无法获得的Morita-Baylis-Hillman(MBH)加合物或E-和Z -α,β-不饱和酮。18岁O-标签研究表明,产品存在两种不同的反应途径。通过采用DFT(wB97XD)/ 6-311 + G(2d,p)方法的量子化学计算,以及用于实际溶剂化的类似导体的筛选模型(COSMO-RS),进一步检查了这些途径。通过使用wB97XD功能,计算数据的准确性估计为1-2 kcal mol -1,通过在理论上的CCSD(T)/ aug-cc-pVTZ级别对各种DFT功能相对于耦合聚类计算的仔细基准测试可以看出。实际上,大多数实验数