نتایج جستجو برای: crafts

تعداد نتایج: 2058  

Journal: :Idil Journal of Art and Language 2017

Journal: :Organic & biomolecular chemistry 2016
Raphaël Lafleur-Lambert John Boukouvalas

The first enantioselective synthesis of the fungal metabolite (+)-O-methylasparvenone was achieved in eight steps and 22% overall yield from inexpensive 3,4,5-trimethoxybenzaldehyde dimethyl acetal. Key steps include (i) early-stage asymmetric alkynylation of an aromatic aldehyde with a propiolate, (ii) intramolecular Friedel-Crafts acylation, and (iii) site-selective cleavage of an aryl methyl...

Journal: :Chemical communications 2012
Jingchao Feng Wenjin Yan Dong Wang Peng Li Quantao Sun Rui Wang

The first asymmetric aza-Friedel-Crafts reaction of indoles and pyrroles with isatin-derived N-Boc ketimines catalyzed by chiral phosphoric acids is reported. In general, derivatives of substituted 3-amino-2-oxindoles were obtained with excellent enantioselectivities and high yields.

2015
Giacomo E M Crisenza Olga O Sokolova John F Bower

An iridium(I) catalyst system, modified with the wide-bite-angle and electron-deficient bisphosphine d(F) ppb (1,4-bis(di(pentafluorophenyl)phosphino)butane) promotes highly branch-selective hydroarylation reactions between diverse acetanilides and aryl- or alkyl-substituted alkenes. This provides direct and ortho-selective access to synthetically challenging anilines, and addresses long-standi...

Journal: :Brazilian Creative Industries Journal 2021

This paper examines the position of crafts within creative industries and considers how this has been affected by growing links between tourism. A review concept indicates that occupy an ambiguous art tradition, which problematises their relationship with industries. is gradually changing at tourism sectors become more closely linked, craft important element development experiences. We role in ...

Journal: :Computers & Mathematics with Applications 1989

Journal: :Proceedings of the Japan Academy 1950

Journal: :Journal of Organometallic Chemistry 2019

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید