2-Butyne-1,4-diol reacts with aliphatic amines in the presence of a catalytic amount of [RuCl2(PPh3)3] at 150 °C to give N-alkylpyrroles in good yields. 1,4-Butanediol reacts with aromatic or aliphatic amines to give N-substituted pyrrolidines in excellent yields; [RuCl2(PPh3)3] and [RuCl3·nH2O–3PBu3] are the best catalysts for aromatic and aliphatic amines, respectively. The reaction of 2-butene-1,4-diol with alkyl amines gives a 1:1 mixture of N-substituted pyrroles and pyrrolidines in high yield.
7-Azabicyclo[2.2.1]heptane as a scaffold for the development of selective sigma-2 (σ2) receptor ligands
作者:Samuel D. Banister、Louis M. Rendina、Michael Kassiou
DOI:10.1016/j.bmcl.2012.04.077
日期:2012.6
A series of N-substituted 7-azabicyclo[2.2.1]heptanes (12–17 and 22–25) and similarly substituted pyrrolidines (32–36 and 41–44) were synthesized as sterically-reduced, achiral analogs of adamantane- and trishomocubane-derived σ ligands. In vitro competition binding assays against σ receptors revealed that arylalkyl N-substituents conferred selectivity for the σ2 subtype, while alicyclic or polycarbocyclic
This disclosure provides compounds and methods of using those compounds to treat metabolic disorders and hyperproliferative disorders, including administration of the compounds in conjunction with hormone receptor antagonists.
Ruthenium and Iron‐Catalysed Decarboxylative
<i>N</i>
‐alkylation of Cyclic α‐Amino Acids with Alcohols: Sustainable Routes to Pyrrolidine and Piperidine Derivatives
A modular and waste‐free strategy for constructing N‐substituted cyclic amines via decarboxylative N‐alkylation of α‐amino acids employing ruthenium‐ and iron‐based catalysts is presented. The reported method allows the synthesis of a wide range of five‐ and six‐membered N‐alkylated heterocycles in moderate‐to‐excellent yields starting from predominantly proline and a broad range of benzyl alcohols
A new decarboxylative N-alkylation reaction of α-aminoacids has been developed. A variety of tertiary amines were obtained in good to excellent yields via the decarboxylative N-alkylation reaction of α-aminoacids with primary alcohols catalyzed by a Cp*Ir complex.