Unlocking the catalytic potential of tris(3,4,5-trifluorophenyl)borane with microwave irradiation
作者:Jamie L. Carden、Lukas J. Gierlichs、Duncan F. Wass、Duncan L. Browne、Rebecca L. Melen
DOI:10.1039/c8cc09459d
日期:——
The catalytic activity of tris(3,4,5-trifluorophenyl)borane has been explored in the 1,2-hydroboration reactions of unsaturated substrates. Under conventional conditions, the borane was found to be active only in the hydroboration of aldehyde, ketone and imine substrates, with alkenes and alkynes not being reduced effectively. The use of microwave irradiation on the other hand has permitted alkenes
Micropores Induced Stereoselective Synthesis of E‐imines: Synergistic Effect between Cerium Species and Micropores in CeAlPO‐5 Molecular Sieves
作者:Yangxin Jin、Yali Cao、Guoyong Fang、Fei Ruan、Qingping Ke
DOI:10.1002/cctc.201900494
日期:2019.7.18
(HP‐CeAlPO‐5) as the catalyst that can catalyze stereoselective synthesis of E‐imines through the reaction of alcohols with amines. Control reactions, DFT calculations and GC‐MS analyses demonstrated that the feature of the uniform “small” micropore in the HP‐CeAlPO‐5 catalyst play a key role in the stereoselective synthesis of E‐imines. In addition, the reaction tolerates a broad range of alcohols and amines
photoinitiators (PIs) for radical polymerization of acrylates show only poor photoreactivity because of the undesired effect of back electron transfer. To overcome this limitation, PIs consisting of a benzaldoxime ester and various sensitizers based on aromatic ketones were introduced. The core of the photoinduced reactivity was established by laser flash photolysis, photo-CIDNP, and EPR experiments at short
由于背电子转移的不良影响,用于丙烯酸酯自由基聚合的典型双分子光引发剂 (PI) 仅显示出较差的光反应性。为了克服这一限制,引入了由苯甲醛肟酯和各种基于芳香酮的敏化剂组成的 PI。光致反应的核心是通过激光闪光光解、光 CIDNP 和短时间尺度的 EPR 实验建立的。根据这些结果,最初形成的亚胺基不是特别活跃。聚合主要由以 C 为中心的自由基引发。Photo-DSC 实验显示的反应性可与经典的单分子 I 型 PI 相媲美,如 Darocur 1173。
[EN] MAGNETICALLY SEPARABLE IRON-BASED HETEROGENEOUS CATALYSTS FOR DEHYDROGENATION OF ALCOHOLS AND AMINES<br/>[FR] CATALYSEURS HÉTÉROGÈNES À BASE DE FER SÉPARABLES MAGNÉTIQUEMENT POUR LA DÉSHYDROGÉNATION D'ALCOOLS ET D'AMINES
申请人:COUNCIL SCIENT IND RES
公开号:WO2016189553A1
公开(公告)日:2016-12-01
The present invention discloses an iron-based nitrogen doped graphene catalyst, process for preparation thereof and use of said catalyst in oxidant-free catalytic dehydrogenation of alcohols and amines to the corresponding carbonyl compounds, amines and N-heterocylic compounds with extraction of molecular hydrogen as the only by-product.
Luminescent reporter compounds that are rotaxanes having the structure
where B—Z—C is a reporter molecule based on a cyanine, squaric acid, or other reporter, and K is a macrocycle that encircles and interlocks with the reporter molecule. Applications of the reporter compounds are provided, as well as reactive intermediates used to synthesize the reporter compounds, and methods of synthesizing the reporter compounds.