Access to β‐Ketonitriles through Nickel‐Catalyzed Carbonylative Coupling of α‐Bromonitriles with Alkylzinc Reagents
作者:Aske S. Donslund、Karoline T. Neumann、Nicklas P. Corneliussen、Ebbe K. Grove、Domenique Herbstritt、Kim Daasbjerg、Troels Skrydstrup
DOI:10.1002/chem.201902206
日期:2019.7.25
Herein, we report a nickel‐catalyzed carbonylative coupling of α‐bromonitriles and alkylzinc reagents with near stoichiometric carbon monoxide to give β‐ketonitriles in good yields. The reaction is catalyzed by a readily available and stable nickel(II) pincercomplex. The developed protocol tolerates substrates bearing a variety of functional groups, which would be problematic or incompatible with
A single-step, mild, neutral, catalyst-free method for cyanohydrin synthesis
作者:Mariam S. Degani、Manoj D. Kakwani、Nutan H. Palsule Desai、Ranjeet Bairwa
DOI:10.1007/s00706-011-0613-4
日期:2012.3
carbonyl compounds can be transformed to their corresponding cyanohydrins in a single step using a dimethyl sulfoxide (DMSO)–water system in excellent yields (75–94%). The major advantages of this system are that the reaction conditions are mild and neutral; the reaction proceeds without catalyst and gives the corresponding cyanohydrins in short time (15–120 min). Graphical Abstract
Importance of the aromatic ring in adrenergic amines. 2. Synthesis and adrenergic activity of some nonaromatic six- and eight-membered ring analogs of .beta.-phenylethanolamine
作者:Gary L. Grunewald、Joseph M. Grindel、Popat N. Patil、Kadhim N. Salman
DOI:10.1021/jm00223a003
日期:1976.1
The synthesis of beta-phenylethanolamine analogs in which the phenyl ring is replaced by cyclohexyl, cyclohexen-4-yl, cyclooctyl, cyclooctenyl, cycloocta-1,3-dien-2-yl, cycloocta-1,5-dienyl, and cyclooctatetraenyl was accompanied by conversion of the corresponding aldehydes to the cyanohydrins followed by reduction with lithium aluminum hydride. A preparatively useful synthesis of 1-formylcyclooctatetraene
Alicyclic substituted oxazolidine-2,4-diones having hypoglycemic activity
申请人:Pfizer Inc.
公开号:US04430337A1
公开(公告)日:1984-02-07
Hypoglycemic oxazolidine-2,4-diones, substituted at the 5-position with a (C.sub.5 -C.sub.9) unsaturated monocyclic, saturated bicyclic or unsaturated bicyclic hydrocarbon radical; methods for their preparation; and method for their use in the treatment of hyperglycemic mammals.
Novel 4H-1,2,4-triazol-3-yl cycloalkanols as potent antitubercular agents
作者:Nutan H. Palsule Desai、Ranjeet Bairwa、Manoj Kakwani、Nilesh Tawari、M. K. Ray、M. G. Rajan、Mariam Degani
DOI:10.1007/s00044-012-0043-9
日期:2013.1
Enzymes of shikimate pathway, dehydroquinase and shikimate kinase represent comparatively newer targets for antitubercular research. Molecular hybridization approach was implemented by integrating the essential features of inhibitors acting on these enzymes of shikimate pathway. Considering the flexibility of alicyclic ring of reported dehydroquinase (DHQ) inhibitors and triazole ring, key feature of the virtual hits of Mtb shikimate kinase, a series of structurally novel, substituted 4H-1,2,4-triazol-3-yl cycloalkanols were designed as antimycobacterial agents. Docking studies of the molecules was carried out on the enzyme DHQ. All the synthesized compounds exhibited promising activity (MIC 0.59-15.5 mu g/ml) against H(37)Rv strains of Mycobacterium tuberculosis using resazurin microtiter assay. Five of the evaluated compounds exhibit MIC < 1 mu g/ml. CC50 values indicate compounds are non-toxic, with selectivity indices >28. These compounds could serve as leads for further optimization to obtain novel antimycobacterial agents.