Divergent mechanisms for the dealkoxycarbonylation of a 2-(3-azetidinyl)malonate by chloride and cyanide
摘要:
The reaction of dimethyl 2-(1-benzylazetidin-3-yl)propane-1,3-dioate with NaCN in wet DMSO at high temperature afforded methyl 2(1-benzylazetidin-3-yl)acetate, whereas similar treatment with NaCl gave methyl 3-benzylazabicyclo-[3.1.0]hexan-2-onecarboxylate. These results provide additional evidence that chloride- and cyanide-mediated cleavages of esters may proceed by different mechanisms.
Nickel-Catalyzed Reversible Functional Group Metathesis between Aryl Nitriles and Aryl Thioethers
作者:Tristan Delcaillau、Philip Boehm、Bill Morandi
DOI:10.1021/jacs.1c00529
日期:2021.3.17
We describe a new functional group metathesis between aryl nitriles and aryl thioethers. The catalytic system nickel/dcype is essential to achieve this fully reversible transformation in good to excellent yields. Furthermore, the cyanide- and thiol-free reaction shows high functional group tolerance and great efficiency for the late-stage derivatization of commercial molecules. Finally, synthetic applications
[EN] PROCESS FOR THE PREPARATION OF 2-(3-(FLUOROMETHYL)AZETIDIN-1-YL)ETHAN-1-OL<br/>[FR] PROCÉDÉ DE PRÉPARATION DE 2-(3-(FLUOROMÉTHYL)AZÉTIDIN-1-YL)ÉTHAN-1-OL
申请人:HOFFMANN LA ROCHE
公开号:WO2018108954A1
公开(公告)日:2018-06-21
Methods of making 2-(3-(fluoromethyl)azetidin-1-yl)ethan-1-ol 9, an intermediate useful for the synthesis of estrogen receptor modulating compounds are described.
制备2-(3-(氟甲基)氮杂环丙基)乙醇9的方法,这是合成雌激素受体调节化合物时有用的中间体。
PROCESS FOR THE PRODUCTION OF SULFONIC ESTERS
申请人:——
公开号:US20030162966A1
公开(公告)日:2003-08-28
Sulfonic acid ester derivatives represented by the general formula (4) or (5) are produced by reacting an amino alcohol derivative represented by the general formula (1) or (2) with an organic sulfonyl halide represented by the general formula (3), in a mixed solvent composed of an aprotic organic solvent and water in the presence of a non-water-prohibiting inorganic base. This procedure can be carried out in a simple, easy, safe and economical manner while reducing the load on the environment.
1
Wherein n represents an integer of 0 to 5, A represents a phenyl group, which may be substituted, R represents a methanesulfonyl, ethanesulfonyl, p-toluenesulfonyl or p-nitrobenzenesulfonyl group and X represents a chloride, bromine or iodine atom.
and MN19, characterized by rings with different size, have been prepared and evaluated for their nootropic activity in the mouse passive-avoidance test. It was found that the optimal ringsize for the analogs of DM235, showing endocyclic both amidic groups, is 6 or 7 atoms. For the compounds structurally related to MN19, carrying an exocyclic amide group, the piperidine ring is the moiety which gives