Synergistic Catalysis by Brønsted Acid/Carbodicarbene Mimicking Frustrated Lewis Pair‐Like Reactivity
作者:Yi‐Chen Chan、Yuna Bai、Wen‐Ching Chen、Hsing‐Yin Chen、Chen‐Yu Li、Ying‐Yann Wu、Mei‐Chun Tseng、Glenn P. A. Yap、Lili Zhao、Hsuan‐Ying Chen、Tiow‐Gan Ong
DOI:10.1002/anie.202107127
日期:2021.9
Carbodicarbene (CDC), unique carbenic entities bearing two lone pairs of electrons are well-known for their strong Lewis basicity. We demonstrate herein, upon introducing a weak Brønstedacid benzyl alcohol (BnOH) as a co-modulator, CDC is remolded into a Frustrated Lewis Pair (FLP)-like reactivity. DFT calculation and experimental evidence show BnOH loosely interacting with the binding pocket of CDC
Method for synthesis of triarylisocyanurates from aryl isocyanates using
申请人:Iowa State University Research Foundation, Inc.
公开号:US05260436A1
公开(公告)日:1993-11-09
A method is provided to prepare triaryl isocyanurates from aryl isocyanates by using triazaprophosphatrane catalysts.
提供了一种方法,通过使用三氮代磷酸三胺催化剂,从芳基异氰酸酯制备三芳基异氰尿酸盐。
Amine-Linked N-Heterocyclic Carbenes: The Importance of an Pendant Free-Amine Auxiliary in Assisting the Catalytic Reaction
作者:Chia-Yi Li、Yi-Yin Kuo、Jie-Hong Tsai、Glenn P. A. Yap、Tiow-Gan Ong
DOI:10.1002/asia.201000829
日期:2011.6.6
amine group, leading to insight about the instability of NHCs arising from the intermolecular interaction of the dangling amine side‐arm. However, the pendant amine plays an important role with respect to the catalytic process, resuscitating the catalytic activity of unsaturated NHC’s through a synergistic effect invoked by the secondary amine. This proof of concept allows us to expand the spectrum of
Donor-substituted triaryl-1,3,5-triazinanes-2,4,6-triones: octupolar NLO-phores with a remarkable transparency–nonlinearity trade-off
作者:Gilles Argouarch、Romain Veillard、Thierry Roisnel、Anissa Amar、Abdou Boucekkine、Anu Singh、Isabelle Ledoux、Frédéric Paul
DOI:10.1039/c1nj20442d
日期:——
We report in this letter the measurement of the hyperpolarizabilities of a series of donor-substituted triaryl-1,3,5-triazinanes-2,4,6-triones by hyper Rayleigh scattering (HRS). A remarkable transparencyânonlinearity trade-off is evidenced for these octupolar NLO-phores which might be accessed in a straightforward synthetic way and in a few steps from commercial isocyanates.
Triaryl-1,3,5-triazinane-2,4,6-triones (Isocyanurates) Peripherally Functionalized by Donor Groups: Synthesis and Study of Their Linear and Nonlinear Optical Properties
The linearoptical (LO) and nonlinearoptical (NLO) properties of a series of isocyanuratesfunctionalized by donor arms at the periphery are reported herein. These octupolar derivatives were obtained in a straightforward way from commercial isocyanate derivatives and were fully characterized. Although several of these compounds are known, those that exhibited the largest NLO activities are all new