Brønsted Acid Catalyzed Dearomatization by Intramolecular Hydroalkoxylation/Claisen Rearrangement: Diastereo‐ and Enantioselective Synthesis of Spirolactams
作者:Peng‐Fei Chen、Bo Zhou、Peng Wu、Binju Wang、Long‐Wu Ye
DOI:10.1002/anie.202113464
日期:2021.12.20
A Brønstedacidcatalyzedintramolecular hydroalkoxylation/Claisen rearrangement is disclosed that involves an unexpected dearomatization of nonactivated arenes and heteroaromatic compounds and allows the practical and atom-economic synthesis of various valuable spirolactams. Moreover, the asymmetric version of this tandem cyclization is also achieved via kinetic resolution by chiral phosphoric acid
The present invention provides compounds of Formula (I), or a pharmaceutically acceptable salt thereof, where R
1
, R
2
, R
3
, R
4
, R
5
, R
6
, A and n are as defined herein. A deuteriated derivative of the compound of Formula (I) is also provided.
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
The present invention provides compounds of Formula (I), or a pharmaceutically acceptable salt thereof, where R1, R2, R3, R4, R5, R6, A and n are as defined herein. A deuteriated derivative of the compound of Formula (I) is also provided.