A practical and inexpensive ‘convertible’ isonitrile for use in multicomponent reactions
摘要:
N-tert-Butylamides are readily converted into the corresponding carboxylic acids by simple nitrosation. The process, which occurs under mild nonaqueous conditions, leaves carboxylic esters untouched and transforms multicomponent reaction products into useful building blocks for further synthetic elaboration. (C) 2010 Elsevier Ltd. All rights reserved.
Direct Cyclopropanation of α‐Cyano β‐Aryl Alkanes by Light‐Mediated Single Electron Transfer Between Donor–Acceptor Pairs
作者:Jing Li、Martin J. Lear、Yujiro Hayashi
DOI:10.1002/chem.202100341
日期:2021.4
formal [2+1] addition of carbene or radical based C1 units to alkenes. In contrast, the one‐pot intermolecular cyclopropanation of alkanes by redoxactive C1 units has remained unrealised. Herein, we achieved this process simply by exposing β‐aryl propionitriles and C1 radical precursors (N‐oxy esters) to base and blue light. The overall process is redox‐neutral and a photocatalyst, whether metal‐ or organic‐based
Chiral oxygenated aliphatic moieties are recurrent in biological and pharmaceutically relevant molecules and constitute one of the most versatile types of functionalities for further elaboration. Herein we report a protocol for straightforward and general access to chiral γ-lactones via enantioselective oxidation of strong nonactivated primary and secondary C(sp3)–H bonds in readily available carboxylic