Bifunctional Polymeric Organocatalysts and Their Application in the Cooperative Catalysis of Morita–Baylis–Hillman Reactions
作者:Cathy Kar-Wing Kwong、Rui Huang、Minjuan Zhang、Min Shi、Patrick H. Toy
DOI:10.1002/chem.200601197
日期:2007.3.5
these polymeric reagents contained either alkyl alcohol or phenol groups on the polymer backbone. The use of these materials as organocatalysts in a range of Morita-Baylis-Hillman reactions indicated that hydroxyl groups could participate in the reactions and accelerate product formation. In the cases examined, phenol groups were more effective than alkyl alcohol groups for catalyzing the reactions
A Machine-Assisted Flow Synthesis of SR48692: A Probe for the Investigation of Neurotensin Receptor-1
作者:Claudio Battilocchio、Benjamin J. Deadman、Nikzad Nikbin、Matthew O. Kitching、Ian R. Baxendale、Steven V. Ley
DOI:10.1002/chem.201300696
日期:2013.6.10
Here we report the direct comparison of a conventional batch mode synthesis of Meclinertant (SR48692, 1), a neurotensin receptor‐1 antagonist, with its machine‐assisted flow chemistry alternative. By using these enabling tools, combined with solid‐supported reagents and scavengers, many process advantages were observed. Care, however, must be taken not to convert these techniques into expensive solutions
An insoluble Merrifield type resin having 4-aminopyridine units is a suitable and reusable heterogeneous catalyst for the BaylisâHillman coupling of aromatic aldehydes and α,β-unsaturated ketones.
Curing catalyst for the reaction between carboxyl functional polymers and epoxy functional compounds for use in the preparation of powder coatings
申请人:DSM N.V.
公开号:EP0538931A2
公开(公告)日:1993-04-28
The invention relates to a curing catalyst for the reaction between carboxyl functional polymers and epoxy functional compound as a basis for powder coatings.
The catalyst is a pyridine according to formula (I),
in which:
X = N,
Z = (C1 -C1 0)alkyl or aryl and
Y = (C1-C10)alkyl and
in which Z and Y together can form a ring which, in addition to a carbon atom, can contain an oxygen atom, a sulphur atom and/or a nitrogen atom
or
X = N,
Z =
Y = (C1-C10)alkyl and
P = polymer
or
X =
and
P = polymer.
本发明涉及一种固化催化剂,用于羧基官能团聚合物和环氧官能团化合物之间的反应,作为粉末涂料的基础。
该催化剂是一种符合式 (I) 的吡啶、
其中
X = N、
Z = (C1 -C1 0)烷基或芳基,以及
Y = (C1-C10)烷基,以及
其中 Z 和 Y 可共同形成一个环,该环除包含一个碳原子外,还可包含一个氧原子、一个硫原子和/或一个氮原子
或
X = N
Z =
Y = (C1-C10)烷基和
P = 聚合物
或
X =
和
P = 聚合物。
Microencapsulated Linear Polymers: “Soluble” Heterogeneous Catalysts
作者:Kristin E. Price、Brian P. Mason、Andrew R. Bogdan、Steven J. Broadwater、Jeremy L. Steinbacher、D. Tyler McQuade
DOI:10.1021/ja063688+
日期:2006.8.1
A new strategy for supporting catalysts based on the microencapsulation of linear polymers is presented. In this paper, we present a DMAP capsule that is capable of catalyzing acylation reactions. The catalyst is compared to DMAP on cross-linked and linear polystyrene, as well as small molecule DMAP. Rapid optimization through modification of encapsulation conditions is demonstrated. The optimization provides a dynamic range of catalysis from 90 to 300% of the rate of DMAP on polystyrene.