Cyclopentane-based human NK1 antagonists. Part 1: Discovery and initial SAR
摘要:
An initial investigation of the novel cyclopentane scaffold 6 afforded low nanomolar human NK1 antagonists having enhanced water solubility properties compared to morpholine 1. A synthesis of this cyclopentane scaffold, having three contiguous chiral centers, and the unexpected determination that the 1,2-trans-2,3-trans-ring stereochemistry, as opposed to the cis-ether/phenyl configuration of the known structures 1-5, is optimal for this class of antagonist are described. (c) 2006 Elsevier Ltd. All rights reserved.
Eco-friendly conjugate hydrocyanation of α-cyanoacrylates using potassium hexacyanoferrate(II) as cyanating reagent
作者:Yu-Peng Zhang、Xiao-Chun Hu、Zheng Li
DOI:10.1515/chempap-2015-0055
日期:2015.1.1
The conjugate hydrocyanation of α-cyanoacrylates through chemoselective 1,4-addition to synthesise α,β-dicyanopropanoates by one-pot two-step procedure usingpotassiumhexacyanoferrate(II) as an eco-friendlycyanidesource, benzoyl chloride as a promoter and potassium carbonate as a catalyst is described. The advantages of this protocol are use of a non-toxic, non-volatile and inexpensive cyanating reagent