نتایج جستجو برای: preparation of alcohols

تعداد نتایج: 21170995  

Journal: :The Journal of the Society of Chemical Industry, Japan 1952

Ahmed Ali Hullio, G.M. Mastoi

A direct and an efficient conversion of a wide range of primary, secondary even tertiary alcohols to the corresponding iodides have been achieved under ionic liquid conditions. The method involves preparation of ionic liquid-based iminium chloride intermediate from DMF-like ionic liquid then stirring it with alcohol in present of sodium iodide. The higher yields of alkyl iodides were obtained w...

Journal: :Journal of the American Chemical Society 2008
Jumreang Tummatorn Gregory B Dudley

Ring-opening/C-C bond cleavage reactions induced by nucleophilic addition of methyl Grignard to 5,6-dihydro-2-pyrone (DHP) triflates 1 furnish homopropargyl alcohols (1 --> 2) stereospecifically with respect to the stereochemistry of 1. Carbonyl extrusion from DHP triflates provides a unified and operationally simple strategy for preparing chiral homopropargyl alcohols.

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه رازی - دانشکده علوم 1388

based on the latest records of typhlops vermicularis merrem, 1820 from iran, this species is distributed in the northern and southern regions of the country. in this study, new records of typhlops vermicularis are presented and it is shown that distribution range of this species is extended towards the eastern and western iran, and according to the new distribution map, it can be assumed that t...

Journal: :Chemical communications 2008
Bernhard J Ueberbacher Herfried Griengl Hansjörg Weber

An ortho-metalation method for free ferrocenyl alcohols has been developed, which allows preparation of planar chiral ferrocene derivatives with high yields and diastereoselectivities.

Journal: :Chemical communications 2010
Manolis D Tzirakis Mariza N Alberti Michael Orfanopoulos

A new general reaction for the preparation of isomerically pure hydroxyalkylated C(60) monoadducts, via the free radical photochemical addition of alcohols to [60]fullerene, is described.

Journal: :Chemical communications 2011
Feng Li Haixia Shan Qikai Kang Lin Chen

The preparation of 2-(N-alkylamino)benzothiazoles via regioselecive N-alkylation of 2-aminobenzothiazoles has been accomplished by using benzylic alcohols as alkylating agents.

2011
Yi Chiao Fan Ohyun Kwon

In this study, we prepared oxizolidines through 1,3-bis(diphenylphosphino)-propane (DPPP)-catalyzed mixed double-Michael reactions of β-amino alcohols with electron-deficient acetylenes. These reactions are very suitable for the diversity-oriented parallel syntheses of oxizolidines because: (i) they are performed under mild metal-free conditions and (ii) the products are isolated without compli...

Journal: :Chemistry 2011
Helen K Scott Varinder K Aggarwal

Organoboron compounds are useful in asymmetric synthesis. We have developed an efficient methodology for the highly enantioselective synthesis of tertiary boronic esters from the corresponding secondary benzylic alcohols. Further stereospecific transformations of the boronic ester moiety are described including the preparation of tertiary alcohols, C-tertiary amines and tertiary arylalkanes. Se...

Journal: :Organic letters 1999
M E Jung J Pontillo

[formula: see text] Treatment of tertiary propargylic alcohols 13 with 3-diazo-2-butanone 6 and catalytic dirhodium tetraacetate in benzene gave good yields of the diastereomeric allenic hydroxyketones 14, with, in some cases, good diastereocontrol. These products are presumably formed via the [2,3]-sigmatropic rearrangement of an alpha-propargyloxy enol derivative. This reaction has been exten...

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