Propylphosphonium hydrogen carbonate ionic liquid supported on nano-silica as a reusable catalyst for the efficient multicomponent synthesis of fully substituted pyridines and bis-pyridines
作者:Fahime Rahmani、Iraj Mohammadpoor-Baltork、Ahmad R. Khosropour、Majid Moghadam、Shahram Tangestaninejad、Valiollah Mirkhani
DOI:10.1039/c5ra03569d
日期:——
(PPHC–nSiO2), was prepared and characterized by FT-IR, TGA, SEM and ICP techniques. The resulting catalyst was used for the efficient synthesis of fully substitutedpyridines via a one-pot multicomponent reaction of aldehydes, malononitrile, and thiols under solvent-free conditions. Expedient synthesis of bis-pyridines from dialdehydes and/or dithiols by using this catalytic system can be considered
制备了一种新型的负载型based基离子液体,载于纳米二氧化硅(PPHC- n SiO 2)上的碳酸氢丙propyl离子液体,并通过FT-IR,TGA,SEM和ICP技术进行了表征。通过在无溶剂条件下醛,丙二腈和硫醇的一锅多组分反应,将所得催化剂用于有效合成全取代的吡啶。通过使用该催化体系由二醛和/或二硫醇方便地合成双吡啶可被认为是该方法的显着优点。此外,即使在第5个循环后也没有明显的催化活性损失。
AROMATIC POLYETHERS
申请人:Moore David Roger
公开号:US20090163692A1
公开(公告)日:2009-06-25
An aromatic polyether comprising structural units derived from a halosulfone sulfonate having structure (I):
wherein R
1
is a C
3
-C
25
aromatic radical, a C
3
-C
25
cycloaliphatic radical, or a C
1
-C
10
aliphatic radical; M is hydrogen or a charge balancing cation; Y
1
is independently at each occurrence a halogen; “t” is an integer having a value of 1 or 2; “s” is an integer having a value 0 to 3, “b” is an integer having a value 1 to 4; and “c” is an integer having a value 1 to 20. Also provided are methods of preparing the aromatic polyethers, and compositions including the aromatic polyethers.