Transition Metal-Free Approach to Propynenitriles and 3-Chloropropenenitriles
作者:Pawan K. Sharma、Sita Ram、Navneet Chandak
DOI:10.1002/adsc.201501103
日期:2016.3.17
A transitionmetal‐free, facile and efficient one‐pot protocol for the synthesis of propynenitriles from readily available 3‐chloropropenals is disclosed. The reaction conditions have also been optimized for the exclusive formation and isolation of 3‐chloropropenenitriles which are important building blocks in general and are intermediates in the synthesis of propynenitriles. The hallmark of the methodology
Asymmetric Synthesis of 1,1-Diarylalkyl Units by a Copper Hydride Catalyzed Reduction: Differentiation Between Two Similar Aryl Substituents
作者:Kihyun Yoo、Hyohyun Kim、Jaesook Yun
DOI:10.1002/chem.200901262
日期:2009.10.26
An efficient method for the preparation of enantiomerically enriched 1,1‐diarylalkyl units has been developed. The use of copperhydride complexed by the (R)‐1‐[(S)‐2‐diphenylphosphino)ferrocenyl]ethyldicyclohexylphosphine (Josiphos) ligand effects a highly enantioselective conjugate reduction of β,β‐diaryl‐substituted α,β‐unsaturated nitriles with aryl groups of similar steric demand and no secondary