نتایج جستجو برای: higher alcohols synthesis

تعداد نتایج: 1379075  

Journal: :Molecules 2008
Guillermo Negrón-Silva C Xochitl Hernández-Reyes Deyanira Angeles-Beltrán Leticia Lomas-Romero Eduardo González-Zamora

A solvent-free approach for the regioselective synthesis of beta-amino alcohols in shorter reaction times and higher yields, compared to conventional heating is described. It involves microwave (MW) exposure of undiluted reactants in the presence of sulphated zirconia (SZ) or sulphated zirconia over MCM-41 (SZM) as catalyst. Both acid materials can be easily recovered and reused.

Journal: :Drug discovery today. Technologies 2013
Ashoka V R Madduri Syuzanna R Harutyunyan Adriaan J Minnaard

The catalytic asymmetric synthesis of tertiary alcohols by the addition of organometallic reagents to ketones is of central importance in organic chemistry. The resulting quaternary stereocentres are difficult to prepare selectively by other means despite their widespread occurrence in natural products and pharmaceuticals. Over the past few years, several seminal reports on the formation of chi...

2013
Dominik Pfaff Gregor Nemecek Joachim Podlech

Carbonitriles and alcohols react in a Lewis acid-promoted Pinner reaction to carboxylic esters. Best results are obtained with two equivalents of trimethylsilyl triflate as Lewis acid. Good yields are achieved with primary alcohols and aliphatic or benzylic carbonitriles, but the straightforward synthesis of acrylates and benzoates starting with acrylonitrile and benzonitrile, respectively, is ...

Journal: :Catalysts 2021

KCoMoS2 was supported on various carbon support materials to study the effect synthesis gas conversion. Next two activated carbons with high micropore volume, a traditional alumina (?-Al2O3) and its coated form (CCA) were studied for comparison. Coating increases selectivity alcohols, but AC-supported catalysts show even higher alcohol selectivities yields, especially at temperatures where conv...

Journal: :Journal of Synthetic Organic Chemistry, Japan 1971

Journal: :Chemistry 2014
Xiao Shen Qinghe Liu Tao Luo Jinbo Hu

Unlike the facile synthesis of β-monofluoromethyl alcohols by nucleophilic monofluoromethylation of epoxides, the synthesis of β-difluoromethyl alcohols by nucleophilic difluoromethylation of epoxides still remains a challenge. Herein, studies on tackling this problem with PhSO(NTBS)CF2H (2; TBS=tert-butyldimethylsilyl) are reported. The preorganization of 2 and epoxides with BF3⋅Et2O was found...

Journal: :NIPPON SUISAN GAKKAISHI 1960

2014
B. Narasimha Reddy R. P. Singh

An efficient and novel synthesis of (R)-rugulactone has been achieved employing Sharpless asymmetric epoxidation of allyl alcohols followed by selective hydride reduction of epoxy alcohols and olefin cross metathesis reactions.

Journal: :Chemical communications 2012
Christophe Berini Oscar Navarro

The use of in situ generated (NHC)-Ni catalytic species (NHC = N-heterocyclic carbene) allows for the synthesis, in short reaction times, of a variety of tertiary alcohols from secondary alcohols through a domino oxidation-addition protocol.

Journal: :Journal of the agricultural chemical society of Japan 1958

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