Supported copper (I) catalyst from fish bone waste: An efficient, green and reusable catalyst for the click reaction toward <i>N</i>
-substituted 1,2,3-TRIAZOLES
作者:Xingquan Xiong、Zhongke Tang、Zhaohong Sun、Xiaoqing Meng、Sida Song、Zhilong Quan
DOI:10.1002/aoc.3946
日期:2018.1
An eco‐efficient, green, and multi‐gram procedure is presented for one‐pot multicomponentsynthesis of N‐substituted 1,2,3‐triazoles by using waste fishbone powders supported CuBr (FBPs‐CuBr) as catalyst. FBPs‐CuBr is found to be an efficient heterogeneous catalyst and a series of 1,2,3‐triazoles are obtained in moderate to excellent yields in water under MW irradiation (70–98%). It can be separated
Disclosed is a process for production of a substituted benzene, which comprises intramolecularly and/or intermolecularly trimerizing a triple bond in an alkyne in the presence of a transition metal catalyst to yield a substituted benzene compound. In the process, the transition metal catalyst is prepared from an iminomethylpyridine represented by the formula (1) or (2), a transition metal salt or a hydrate thereof, and a reducing agent in a reaction system and is used to perform the trimerization. The process can be used in any one of the intramolecular cyclization of a triyne compound, the cyclization of a diyne compound or an alkyne compound and the intermolecular cyclization of three molecules of an alkyne compound, is excellent in economic effectiveness and operability, and is practically advantageous.
wherein R
1
and R
3
independently represent a linear or cyclic C
1
-C
20
aliphatic hydrocarbon group or the like; R
2
represents a hydrogen atom or the like; X represents a hydrogen atom, O or the like; and Y represents O, S or the like.
Fused ring systems derived from reactions of half-open titanocenes with diynes: Syntheses, characterization, cage rearrangements, and structural studies
作者:Anne M. Wilson、Arnold L. Rheingold、Thomas E. Waldman、Michael Klein、Frederick G. West、Richard D. Ernst
DOI:10.1016/j.jorganchem.2008.09.008
日期:2009.4
provide both allyl and diene coordination to the Ti(C5H5) fragments, resulting in 16 electron configurations. On standing, these species undergo cage rearrangements, via CC bond activation reactions. Structural data have been obtained for a number of the fused ring species, as well as one of the rearrangement products.
几种α,ω-二炔与半开放的钛茂金属配合物[M(C 5 H 5)(2,4-C 7 H 11)(PR 3)]的反应(C 7 H 11 =二甲基戊二烯基)导致5 + 2 + 2环结构,产生九元环与四元及更大的环融合。这些反应耐受显着的功能化,甚至允许存在杂原子,例如氧和氮。九元环同时为Ti(C 5 H 5)片段提供烯丙基和二烯配位,从而形成16个电子构型。站立时,这些物种通过C进行笼子重排C键活化反应。已经获得了许多稠合环物种以及一种重排产物的结构数据。
Meller, Anton; Hirninger, Franz J.; Noltemeyer, Mathias, Chemische Berichte, 1981, vol. 114, # 7, p. 2519 - 2535
作者:Meller, Anton、Hirninger, Franz J.、Noltemeyer, Mathias、Maringgele, Walter