[reaction: see text] 1,1-Diarylalkanes are easily synthesized by CH-functionalization reactions of electron-rich arenes and heteroarenes with styrenes in the presence of FeCl(3) as catalyst.
Process for the preparation of substituted phenols
申请人:Daicel Chemical Industries, Ltd.
公开号:EP1967505A1
公开(公告)日:2008-09-10
A substituted phenolic compound is prepared by oxidizing a substituted diarylethane compound with oxygen in the presence of a nitrogen-containing cyclic compound, and treating the oxidized product with an acid. The nitrogen-containing cyclic compound includes, as a constituent of its ring, a skeleton represented by following Formula (I):
wherein X is oxygen atom or an -OR group, where R is hydrogen atom or a hydroxyl-protecting group. The substituted diarylethane compound is represented by following Formula (1):
wherein each of Ring Ar1 and Ring Ar2 is independently a monocyclic or polycyclic aromatic carbocyclic ring; Y1 is an electron-donating group; Y2 is an electron-withdrawing group; "p" is an integer of 1 or more; and "q" is an integer of 0 or more. The substituted phenolic compound is represented by following Formula (2):
wherein Ring Ar1, Y1, and "p" are as defined above.
Selective one-pot synthesis of various phenols from diarylethanes
作者:Ryota Nakamura、Yasushi Obora、Yasutaka Ishii
DOI:10.1039/b804055a
日期:——
Various substituted phenols were selectively synthesized by a one-pot reaction through the NHPI-catalyzed aerobic oxidation of 1,1-diarylethanes followed by treatment with dilute sulfuric acid.
Iron(III) Triflimide as a Catalytic Substitute for Gold(I) in Hydroaddition Reactions to Unsaturated Carbon-Carbon Bonds
作者:Jose R. Cabrero-Antonino、Antonio Leyva-Pérez、Avelino Corma
DOI:10.1002/chem.201300386
日期:2013.6.24
In this work it is shown that iron(III) and gold(I) triflimide efficiently catalyze the hydroaddition of a wide array of nucleophiles including water, alcohols, thiols, amines, alkynes, and alkenes to multiple CC bonds. The study of the catalytic activity and selectivity of iron(III), gold(I), and Brønsted triflimides has unveiled that iron(III) triflimide [Fe(NTf2)3] is a robust catalyst under heating
在这项工作中表明,三氟甲磺酸铁(III)和金(I)可有效催化多种亲核试剂(包括水,醇,硫醇,胺,炔烃和烯烃)加氢成多个CC键。铁(III),金(I)和布朗斯台德三氟甲酸酯的催化活性和选择性的研究表明,三氟甲铁(III)[Fe(NTf 2)3 ]在加热条件下是一种坚固的催化剂,而金(I) )甚至由PPh 3稳定的三氟甲酰亚胺在80°C时容易分解并释放出三氟乙二酸(HNTf 2),该三氟乙二酸可催化相应的反应,如原位19 F,15 N和311 H NMR光谱。此处给出的结果表明,两种催化剂类型均具有弱点和优势,并且彼此互补。三氟化铁(III)可以替代三氟化金(I),作为不饱和碳-碳键加氢反应的催化剂。