Anion recognition and transport properties of sulfamide-, phosphoric triamide- and thiophosphoric triamide-based receptors
作者:Philippa B. Cranwell、Jennifer R. Hiscock、Cally J. E. Haynes、Mark E. Light、Neil J. Wells、Philip A. Gale
DOI:10.1039/c2cc38198b
日期:——
Studies of sulfamide, phosphoric triamide and thiophosphoric triamide-based organocatalysts show that the phosphorus containing systems are effective new hydrogen bonding motifs for the recognition and transport of anions.
作者:Andrew A. Rodriguez、Hoseong Yoo、Joseph W. Ziller、Kenneth J. Shea
DOI:10.1016/j.tetlet.2009.09.129
日期:2009.12
New achiral sulfamide, phosphoric triamide, and thiophosphoric triamide compounds have been synthesized. Their activity as hydrogen bond catalysts for the Friedel-Crafts and Baylis-Hillman reactions compares favorably with that of a known and an active thiourea catalyst. The new compounds were also studied by X-ray crystallography and their solid state structures are described. (C) 2009 Elsevier Ltd. All rights reserved.
Hydrogen Bond Donor Catalyzed Cationic Polymerization of Vinyl Ethers
作者:Veronika Kottisch、Janis Jermaks、Joe‐Yee Mak、Ryan A. Woltornist、Tristan H. Lambert、Brett P. Fors
DOI:10.1002/anie.202013419
日期:2021.2.23
The synthesis of high‐molecular‐weight poly(vinyl ethers) under mild conditions is a significant challenge, since cationicpolymerization reactions are highly sensitive to chain‐transfer and termination events. We identified a novel and highly effective hydrogen bond donor (HBD)–organic acid pair that can facilitate controlled cationicpolymerization of vinyl ethers under ambient conditions with excellent
<sup>31</sup>P NMR Spectroscopically Quantified Hydrogen-Bonding Strength of Thioureas and Their Catalytic Activity in Diels-Alder Reactions
作者:Alexander R. Nödling、Gergely Jakab、Peter R. Schreiner、Gerhard Hilt
DOI:10.1002/ejoc.201402871
日期:2014.10
the 31PNMR chemical shifts. A linear correlation between both variables was observed throughout the functionalized thioureas. The 31PNMR probe correlation fared better in comparison to a pKa correlation. Accordingly, the quantification presented herein by using a 31PNMR probe offers an elegant way to estimate the catalyticactivity of thiourea catalysts in hydrogen-bond-activated reactions such