Copper(I)-catalyzed coupling reaction of aryl boronic acids with N,O-acetals and N,N-aminals under atmosphere leading to α-aryl glycine derivatives and diarylmethylamine derivatives
摘要:
We demonstrated a copper(I)-catalyzed coupling reaction of aryl boronic acids with N,O-acetals and N,N-aminals leading to the synthesis of alpha-aryl glycines and diarylmethylamines. Under an ambient atmosphere, this catalytic system could be applied to the activation of a C(sp(3))-O bond of N,O-acetals with an ester and an aryl group, or without a coordinating substituent, as well as to a C(sp(3))-N bond of N,N-aminals. (C) 2015 Elsevier Ltd. All rights reserved.
Practical Synthesis of Natural
Amino Acid Derivatives: Hf(OTf)<sub>4</sub>-Catalyzed Mannich-Type
Reaction of Ketene Silyl Acetals or Enol Silyl Ethers with <i>N</i>,<i>O</i>-Acetals
as a Glycine Cation Equivalent
作者:Norio Sakai、Asuka Sato、Takeo Konakahara
DOI:10.1055/s-0029-1216743
日期:——
The authors demonstrated the Hf(OTf) 4 -catalyzed Mannich-type reaction of an enol silyl ether and a ketene silyl acetal with an N,O-acetat leading to the preparation of amino acid derivatives. In particular, use of the N,O-acetal having a bis(trimethylsilyl)amino group directly produced N-unprotected aspartic acid derivatives after a standard aqueous workup.
Facile Approach to Natural or Non-Natural Amino Acid Derivatives: Me<sub>3</sub>SiCl-Promoted Coupling Reaction of Organozinc Compounds with N,O-Acetals