32726-81-1Relevant articles and documents
En Route to a Practical Primary Alcohol Deoxygenation
Dai, Xi-Jie,Li, Chao-Jun
, p. 5433 - 5440 (2016/05/19)
A long-standing scientific challenge in the field of alcohol deoxygenation has been direct catalytic sp3 C-O defunctionalization with high selectivity and efficiency, in the presence of other functionalities, such as free hydroxyl groups and amines widely present in biological molecules. Previously, the selectivity issue had been only addressed by classic multistep deoxygenation strategies with stoichiometric reagents. Herein, we propose a catalytic late-transition-metal-catalyzed redox design, on the basis of dehydrogenation/Wolff-Kishner (WK) reduction, to simultaneously tackle the challenges regarding step economy and selectivity. The early development of our hypothesis focuses on an iridium-catalyzed process efficient mainly with activated alcohols, which dictates harsh reaction conditions and thus limits its synthetic utility. Later, a significant advancement has been made on aliphatic primary alcohol deoxygenation by employing a ruthenium complex, with good functional group tolerance and exclusive selectivity under practical reaction conditions. Its synthetic utility is further illustrated by excellent efficiency as well as complete chemo- and regio-selectivity in both simple and complex molecular settings. Mechanistic discussion is also included with experimental supports. Overall, our current method successfully addresses the aforementioned challenges in the pertinent field, providing a practical redox-based approach to the direct sp3 C-O defunctionalization of aliphatic primary alcohols.
Facial amphiphiles and methods of use
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Page/Page column 69, (2015/07/27)
The invention provides amphiphilic compounds with hydrophobic and hydrophilic faces. The compounds can be readily prepared from steroids such as cholic acid or deoxycholic acid, which provide hydrophobic skeletons with structures similar to that of the li
Synthesis of 7-deoxycholic amides or cholanes containing distinctive ion-recognizing groups at C3 and C12 and evaluation for ion-selective ionophores
On, Jeung Hoon,Cho, Kui Tae,Park, Youngjin,Hahm, Sunmi,Kim, Wook,Cho, Joo Young,Hwang, Ji Hyeon,Jun, Young Moo,Cha, Guen Sig,Nam, Hakhyun,Kim, Byeong Hyo
scheme or table, p. 1415 - 1423 (2009/04/11)
Tweezer-type ionophores containing C3-bipyridyl and C12-dithiocarbamoyl groups, or C3-bithiophenyl with C12-dithiocarbamoyl groups on a 7-deoxycholic amide or cholane derivatives were designed and synthesized. Potentiometric evaluation of the PVC membrane
Cholanic acid ring based 4-(trifluoroacetyl)phenyl derivatives, process for preparation and use thereof
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, (2008/06/13)
The present invention relates to a cholanic acid ring based 4-(trifluoroacetyl)phenyl derivatives of the following formula 1, process for preparation and use thereof. The cholanic acid ring based 4-(trifluoroacetyl)phenyl derivatives of the present invention may be used as a host material in the host-guest chemistry, in detail as a material for ion sensors, optical sensors, gas sensors, biosensors, chromatographies, photostimulated ion-binding resins, ion exchange resins and organic reactions. (In the above formula 1, R, R1, R2, R3and n are defined in the specifications).
