Enantioselective Intramolecular α‐Arylation of Benzylamine Derivatives: Synthesis of a Precursor to Levocetirizine
作者:Rakesh K. Saunthwal、Maria Schwarz、Rajendra K. Mallick、William Terry‐Wright、Jonathan Clayden
DOI:10.1002/anie.202216758
日期:2023.3.27
The deprotonation of N′-aryl urea derivatives with a chiral lithium amide base leads to an enantioselective C-arylation of benzylamines. An unusual stereoretentive substitution reaction followed by N-deprotection of the urea forms diarylmethylamine derivatives, including a synthetic intermediate en route to the drug levocetirizine.
N'-芳基脲衍生物与手性氨基锂碱基的去质子化导致苄胺的对映选择性 C-芳基化。一个不寻常的立体保留取代反应,随后是尿素的N-脱保护,形成二芳基甲胺衍生物,包括合成药物左西替利嗪的中间体。