نتایج جستجو برای: asymmetric synthesis

تعداد نتایج: 470048  

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه سمنان - دانشکده شیمی 1391

we used dbsa and nano-magnetic for the synthesis of amido alkylnaphtols.

Journal: :Chemical communications 2010
Mohamed Hagar Fabio Ragaini Elena Monticelli Alessandro Caselli Piero Macchi Nicola Casati

The synthesis of new pinene-derived chiral cyclopropylamines and their use in the synthesis of the first asymmetric Alkyl-BIAN ligands (Alkyl-BIAN = bis-(alkylimino)acenaphthenequinone) are reported.

Journal: :Chemical Society reviews 2014
Tomohiro Yasukawa Hiroyuki Miyamura Shū Kobayashi

Chiral ligand-modified metal nanoparticles possess an attractive potential for application in asymmetric synthesis. This article focuses on chiral-nanoparticle-catalyzed asymmetric C-C bond formation reactions and discusses the nature of the active species.

Journal: :Chemical communications 2010
Nobuaki Takahashi Takeshi Ito Yohei Matsuda Noriyuki Kogure Mariko Kitajima Hiromitsu Takayama

The first asymmetric total synthesis of psychotrimine, a trimeric indole alkaloid, was accomplished via an asymmetric Ireland-Claisen rearrangement to construct a chiral quaternary carbon center, thereby establishing the absolute configuration of psychotrimine.

2009
Xiao Yin Mak Paola Laurino Peter H Seeberger

An overview of asymmetric synthesis in continuous flow and microreactors is presented in this review. Applications of homogeneous and heterogeneous asymmetric catalysis as well as biocatalysis in flow are discussed.

Journal: :Chemical communications 2013
Jian Hu Yunpeng Lu Yongxin Li Jianrong Steve Zhou

Bisphosphine oxides formed highly active asymmetric Heck catalysts, which were applied in asymmetric synthesis of pharmacologically active azacycles. Olefin insertion proceeded via cis pathways, different from P,N-ligands.

Journal: :Chemical communications 2004
Naoyoshi Maezaki Hiroaki Tominaga Naoto Kojima Minori Yanai Daisuke Urabe Tetsuaki Tanaka

The first and concise total synthesis of murisolin (1) was accomplished using asymmetric alkynylation and Sonogashira coupling as the key steps. The threo/trans/threo-type THF ring moiety was constructed with excellent stereoselectivity by asymmetric alkynylation of 1,6-heptadiyne to alpha-tetrahydrofuranic aldehyde, which was also prepared via the asymmetric alkynylation.

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه شیراز - دانشکده علوم 1391

in this thesis, we exploit a simple and suitable method for immobilization of copper(ii) complex of 4?-phenyl-terpyridine on activated multi-walled carbon nanotubes [amwcnts-o-cu(ii)-phtpy]. this nanostructure was characterized by various physico-chemical techniques. to ensure the efficiency and fidelity of copper species, the implementation of three-component strategies in click-chemistry all...

Journal: :Organic & biomolecular chemistry 2012
Jaebong Jang Jong-Wha Jung Jaeseung Ahn Jaehoon Sim Dong-Jo Chang Dae-Duk Kim Young-Ger Suh

The asymmetric formal synthesis of schulzeines A and C is described. Key features of the synthesis include the efficient and stereoselective construction of the benzoquinolizidine skeleton via the aza-Claisen rearrangement-induced ring expansion of the 1-vinyl-N-glycyl-isoquinoline, which was prepared by the highly enantioselective asymmetric allylation of the 8-benzyloxy-substituted dihydroiso...

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