Ligand-free palladium assisted insertion of isocyanides to urea derivatives for cascade synthesis of phenylamino-substituted quinazolinones
摘要:
Palladium catalyzed cascade coupling of substituted urea derivatives and tert-butyl isocyanide for the efficient synthesis of phenylamino-substituted quinazolinones has been developed in moderate to good yields. This method provides a short and alternative approach for the synthesis of quinazolinones derivatives which are valuable compounds with biological and pharmacological potentials. A plausible mechanistic scheme is proposed. (C) 2014 Elsevier Ltd. All rights reserved.
Odorless Isocyanide Chemistry: An Integrated Microfluidic System for a Multistep Reaction Sequence
作者:Siddharth Sharma、Ram Awatar Maurya、Kyoung-Ik Min、Guan-Young Jeong、Dong-Pyo Kim
DOI:10.1002/anie.201303213
日期:2013.7.15
continuous‐flow microfluidic setup enables in situ generation, extraction, separation, and reaction of foul‐smelling isocyanides with little exposure to the surroundings. Isocyanides were generated by dehydration of the corresponding N‐substituted formamides, and several representative isocyanide‐based organic reactions were successfully performed. DIPEA=N,N‐diisopropylethylamine.