THERAPEUTIC SUBSTITUTED HYDANTOINS, AND RELATED COMPOUNDS
申请人:Old David W.
公开号:US20090281101A1
公开(公告)日:2009-11-12
Compounds comprising a structure
or a pharmaceutically acceptable salt thereof, or a prodrug thereof;
wherein a dashed line represents the presence or absence of a bond are disclosed,
wherein Y, A, B, and J are as described.
Methods, compositions, and medicaments related thereto are also disclosed.
We developed a chromium-catalyzed, photochemical, and linear-selective alkylation of aldehydes with alkylzirconium species generated in situ from a wide range of alkenes and Schwartz’s reagent. Photochemical homolysis of the C–Zr bond afforded alkyl radicals, which were then trapped by a chromium complex catalyst to generate the alkylchromium(III) species for polar addition to aldehydes. The reaction
Nickel-Catalyzed Guerbet Type Reaction: C-Alkylation of Secondary Alcohols <i>via</i> Double (de)Hydrogenation
作者:Reshma Babu、Murugan Subaramanian、Siba P. Midya、Ekambaram Balaraman
DOI:10.1021/acs.orglett.1c00782
日期:2021.5.7
Acceptorless double dehydrogenativecross-coupling of secondary and primaryalcohols under nickel catalysis is reported. This Guerbet type reaction provides an atom- and a step-economical method for the C-alkylation of secondaryalcohols under mild, benign conditions. A broad range of substrates including aromatic, cyclic, acyclic, and aliphatic alcohols was well tolerated. Interestingly, the C-alkylation
Ionic-Surfactant-Coated Burkholderia cepacia Lipase as a Highly Active and Enantioselective Catalyst for the Dynamic Kinetic Resolution of Secondary Alcohols
作者:Hyunjin Kim、Yoon Kyung Choi、Jusuk Lee、Eungyeong Lee、Jaiwook Park、Mahn-Joo Kim
DOI:10.1002/anie.201104141
日期:2011.11.11
With a coat for activity: A highly active enzyme was prepared by coating Burkholderia cepacia lipase with an ionic surfactant for use in dynamic kineticresolution (DKR). Important features of this enzyme include: the fastest DKR of 1‐phenylethanol, the highlyenantioselective DKR of a wide range of secondary alcohols (RCH(OH)Ar), and the switching of lipase enantioselectivity in DKR depending on the shape
Electronictuning: Nitroxylradical 1 is shown to be an efficient catalyst for the oxidation of secondary alcohols, and promotes oxidation through an oxoammonium species which is highly reactive because of the adjacent electron‐withdrawing ester groups. Chemoselectiveoxidation of benzylic alcohols in the presence of aliphatic alcohols is observed and is proposed to proceed by a rate‐determining hydride