Nickel-Catalyzed Cross-Couplings of Benzylic Pivalates with Arylboroxines: Stereospecific Formation of Diarylalkanes and Triarylmethanes
摘要:
We have developed a stereospecific nickel-catalyzed cross-coupling of benzylic pivalates with arylboroxines. The success of this reaction relies on the use of Ni(cod)(2) as the catalyst and NaOMe as a uniquely effective base. This reaction has broad scope with respect to the arylboroxine and benzylic pivalate, enabling the synthesis of a variety of diarylalkanes and triarylmethanes in good to excellent yields and ee's.
Selective Catalytic Synthesis of α-Alkylated Ketones and β-Disubstituted Ketones via Acceptorless Dehydrogenative Cross-Coupling of Alcohols
作者:Dipanjan Bhattacharyya、Bikash Kumar Sarmah、Sekhar Nandi、Hemant Kumar Srivastava、Animesh Das
DOI:10.1021/acs.orglett.0c04098
日期:2021.2.5
phosphine-free pincer ruthenium(III) catalyzed β-alkylation of secondaryalcohols with primary alcohols to α-alkylated ketones and two different secondaryalcohols to β-branched ketones are reported. Notably, this transformation is environmentally benign and atom efficient with H2O and H2 gas as the only byproducts. The protocol is extended to gram-scale reaction and for functionalization of complex vitamin E
Pd-Catalyzed Carbonylative Cross-Coupling Reactions by Triorganoindiums: Highly Efficient Transfer of Organic Groups Attached to Indium under Atmospheric Pressure
作者:Phil Ho Lee、Sung Wook Lee、Kooyeon Lee
DOI:10.1021/ol034167j
日期:2003.4.1
[reaction: see text] A highly atom-efficient synthetic method of unsymmetrical ketones was developed by using trialkyl- and triarylindiums, which could be employed as effective cross-coupling partners in Pd-catalyzed carbonylative cross-coupling reactions with a variety of organic electrophiles. The present method produced unsymmetrical ketones and 1,4-diacylbenzenes in good yields with highly efficient
A simple heterogeneous Ru/CeO2catalyst was found to be effective for transfer-allylation from homoallyl alcohols to aldehydes, followed by isomerization to give the saturated ketones in high yields.
Compounds of formula (I) or pharmaceutically acceptable salts thereof, exhibit 5-HT
1A
agonism in addition to noradrenaline reuptake inhibition and optionally also 5-HT reuptake inhibition are useful for the treatment of obesity.
Phosphine‐Free Pincer Ruthenium‐Catalyzed <i>α</i>‐Alkylation of Ketones with Secondary Alcohols to form <i>β</i>‐Branched Ketones
作者:Dipanjan Bhattacharyya、Priyanka Adhikari、Nitumoni Hazarika、Bikash Kumar Sarmah、Animesh Das
DOI:10.1002/cctc.202300542
日期:2023.7.21
An efficient and expedient method was developed for α-alkylation of aromatic ketones with secondary alcohols to produce β-disubstituted ketones using phosphine-free pincer ruthenium complexes as the catalyst. This selective, catalytic C−C bond forming reaction proceeds with low catalyst load, catalytic amount of base under air and produces H2O as the only by-product, making the process environmentally
以无膦钳钌配合物为催化剂,开发了一种高效、便捷的芳香酮与仲醇α-烷基化生产β-二取代酮的方法。这种选择性催化 C−C 键形成反应在空气中以低催化剂负载和催化量的碱进行,并产生 H 2 O 作为唯一的副产物,使该过程环境友好且原子效率高。