Stereoselective direct reductive amination of ketones with electron-deficient amines using Re2O7/NaPF6 catalyst
作者:Braja Gopal Das、Prasanta Ghorai
DOI:10.1039/c3ob40918j
日期:——
The first example of direct reductive amination (DRA) of ketones with electron-deficient amines (EDA) such as Cbz-, Boc-, EtOCO-, Fmoc-, Bz-, ArSO2-, etc. protected amines have been achieved using catalytic Re2O7/NaPF6. Excellent chemoselectivities as well as diastereoselectivity (for 2-alkyl cyclohexanones) were obtained.
The present invention relates to the use of novel triazolopyridine derivatives of formula I:
wherein all variable substituents are defined as described herein, which are SYK inhibitors and are useful for the treatment of auto-immune and inflammatory diseases.
Stereochemical editing logic powered by the epimerization of unactivated tertiary stereocenters
作者:Yu-An Zhang、Vignesh Palani、Alexander E. Seim、Yong Wang、Kathleen J. Wang、Alison E. Wendlandt
DOI:10.1126/science.add6852
日期:2022.10.28
The stereoselective synthesis of complex targets requires the precise orchestration of chemical transformations that simultaneously establish the connectivity and spatial orientation of desired bonds. In this work, we describe a complementary paradigm for the synthesis of chiral molecules and their isomers, which tunes the three-dimensional structure of a molecule at a late stage. Key to the success