High‐Pressure‐Mediated Thiourea‐Organocatalyzed Asymmetric Michael Addition to (Hetero)aromatic Nitroolefins: Prediction of Reaction Parameters by PCP‐SAFT Modelling
作者:Thomas Weinbender、Michael Knierbein、Lukas Bittorf、Christoph Held、Riko Siewert、Sergey P. Verevkin、Gabriele Sadowski、Oliver Reiser
DOI:10.1002/cplu.202000364
日期:2020.6
Thiourea‐organocatalyzed Michael additions of diethyl malonate to various heteroaromatic nitroolefins (13 examples) have been studied under high‐pressure (up to 800 MPa) and ambient pressure conditions. High pressure was conducive to enhanced product yields by a factor of 2–12 at a given reaction time, high reaction rates (reaction times were decreased from 72–24 h down to 4–24 h) and high enantioselectivity
在高压(最高800 MPa)和环境压力条件下,已经研究了硫脲有机催化的丙二酸二乙酯的迈克尔加成反应(13个实例)。在给定的反应时间下,高压有助于将产品收率提高2–12倍,反应速度高(反应时间从72–24 h降低至4–24 h)和高对映选择性。使用扰动链极性统计缔合流体理论(PCP-SAFT)来阐明溶剂使反应速率和收率最大化的影响,这首次使高静水压条件下的动力学曲线得以预测。