Transesterification of trimethyl orthoacetate: an efficient protocol for the synthesis of 4-alkoxy-2-aminothiophene-3-carbonitriles
摘要:
A facile one-pot method is reported for the synthesis of 4-alkoxy-2-aminothiophene-3-carbonitriles. Transesterification of trimethylorthoacetate technique allowed introducing alkoxy substituents into 2-aminothiophene ring system. Diverse alkoxy substituents could be introduced efficiently by using this methodology. Further the synthesis of some of new 4-alkylamino-2-aminothiophenes is also reported. (C) 2012 Elsevier Ltd. All rights reserved.
Moskva,V.V. et al., Journal of general chemistry of the USSR, 1967, vol. 37, p. 1540 - 1543
作者:Moskva,V.V. et al.
DOI:——
日期:——
Moskva,V.V. et al., Journal of general chemistry of the USSR, 1968, vol. 38, p. 202
作者:Moskva,V.V. et al.
DOI:——
日期:——
System and method for reducing fouling in a reactor
申请人:Martin Joel L.
公开号:US20100048837A1
公开(公告)日:2010-02-25
The techniques disclosed provide a treatment method for passivating the interior surface of a polymerization reactor to minimize the formation of a polymer coating on the surface. The passivation is performed using a passivating agent that reacts with adsorbed water to form labile passivation products. Both the passivating agent and passivation products may be easily removed from the reactor prior to polymerization. Other embodiments provide a reactor system with a tank configured to automatically add a passivating agent to the reactor and processes for making polymers using a treated reactor.