Palladium-Catalyzed Controlled Carbopalladation of Benzyne
作者:Eiji Yoshikawa、K. V. Radhakrishnan、Yoshinori Yamamoto
DOI:10.1021/ja001205a
日期:2000.8.1
derivatives 16 in moderate yields (ii). The reaction of benzyne precursor 1a with the alkynes 15a−c,f−h in the presence of Pd(OAc)2 (5 mol %)−(o-tolyl)3P (5 mol %) catalyst and CsF (2.0 equiv) in CH3CN gave the phenanthrene derivatives 17 (iii), whereas the reaction of 1a with the alkynes 15a,b,i in the presence of the same catalysts and CsF in CH3CN−toluene gave the indene derivatives 18 in good yields (iv)
Rhodium-Catalyzed Linear Cross-Trimerization of Two Different Alkynes with an Alkene and Two Different Alkenes with an Alkyne
作者:Masayuki Kobayashi、Ken Tanaka
DOI:10.1002/chem.201200903
日期:2012.7.23
paths with rhodium: A cationic RhI/H8‐BINAPcomplex has been found to catalyze the linear cross‐trimerization of terminal alkynes, acetylenedicarboxylates, and acrylamides to give substituted trienes. The asymmetric linear cross‐trimerization, giving substituted chiral dienes, has also been achieved by using monosubstituted alkenes and (R)‐BINAP instead of terminal alkynes and H8‐BINAP (see scheme;
与铑的交叉路径:阳离子Rh I / H 8 ‐BINAP络合物可催化末端炔烃,乙炔二羧酸酯和丙烯酰胺的线性交叉三聚反应,生成取代的三烯。还可以通过使用单取代的烯烃和(R)-BINAP代替末端炔烃和H 8 -BINAP(参见方案; H 8 -BINAP = 2,2'-bis )来实现不对称线性交叉三聚,得到取代的手性二烯。(二苯基膦基)-5,5',6,6',7,7',8,8'-八氢-1,1'-联萘基; BINAP = 2,2'-双(二苯基膦基)-1,1'-联萘]]。
Exploration of [2 + 2 + 2] cyclotrimerisation methodology to prepare tetrahydroisoquinoline-based compounds with potential aldo–keto reductase 1C3 target affinity
作者:Ana R. N. Santos、Helen M. Sheldrake、Ali I. M. Ibrahim、Chhanda Charan Danta、Davide Bonanni、Martina Daga、Simonetta Oliaro-Bosso、Donatella Boschi、Marco L. Lolli、Klaus Pors
DOI:10.1039/c9md00201d
日期:——
Tetrahydroisoquinoline (THIQ) is a key structural component in many biologically active molecules including natural products and synthetic pharmaceuticals.
四氢异喹啉(THIQ)是许多生物活性分子中的一个关键结构成分,包括天然产物和合成药物。
Rhodium-Catalyzed Tandem Cyclization: Formation of 1<i>H</i>-Indenes and 1-Alkylideneindans from Arylboronate Esters in Aqueous Media
作者:Mark Lautens、Tzvetelina Marquardt
DOI:10.1021/jo049722p
日期:2004.7.1
functionalized organorhodium intermediate which can cyclize onto nonterminal acetylenes in good to excellent yields. The catalytic system involves the use of electron-rich, sterically bulky ligands as tri-tert-butylphosphonium tetrafluoroborate stabilizing the organorhodium intermediates and reduces the incidence of protodeboronation in aqueous media.
Efficient Intermolecular [2 + 2 + 2] Alkyne Cyclotrimerization in Aqueous Medium Using a Ruthenium(IV) Precatalyst
作者:Victorio Cadierno、Sergio E. García-Garrido、José Gimeno
DOI:10.1021/ja066552k
日期:2006.11.1
bis(allyl)-ruthenium(IV) complex [Ru(eta3:eta3-C10H16)(mu-Cl)Cl}2] (C10H16 = 2,7-dimethylocta-2,6-diene-1,8-diyl) was found to catalyze efficiently the [2 + 2 + 2] cyclization of terminal and internal alkynes in aqueous medium.