57844-36-7Relevant academic research and scientific papers
One-Pot Synthesis of Decahydropyrene via Tandem C-H Activation/Intramolecular Diels-Alder/1,3-Dipolar Cycloaddition
Lin, Hui,Dong, Lin
supporting information, p. 5524 - 5527 (2016/11/17)
A novel decahydropyrene synthesis has been successfully developed involving a tandem rhodium-catalyzed C-H activation/intramolecular Diels-Alder reaction/1,3-dipolar cycloaddition cascade process by using diazole as a traceless directing group. The advantage of this one-pot strategy is a quite simple, efficient, highly stereoselective, and unique product structure.
Intramolecular cycloadditions of photogenerated azaxylylenes with oxadiazoles provide direct access to versatile polyheterocyclic ketopiperazines containing a spiro-oxirane moiety
Kumar, N. N. Bhuvan,Kuznetsov, Dmitry M.,Kutateladze, Andrei G.
supporting information, p. 438 - 441 (2015/03/03)
Photogenerated azaxylylenes undergo intramolecular cycloadditions to 1,3,4-oxadiazole pendants, which are accompanied by concomitant release of dinitrogen, yielding functionalized ketopiperazinoquinolinols containing an oxirane moiety fused to the quinolinole moiety while spiro-connected to diketopiperazine. These primary photoproducts are reactive versatile intermediates which can be further derivatized under nucleophilic SN1- or SN2-like ring opening of the oxirane moiety. The oxidized quinolinones undergo new rearrangements under the conditions of the Schmidt reaction, leading to unprecedented triazacanoindolinones.
Development of a Large-Scale Route to an MCH1 Receptor Antagonist: Investigation of a Staudinger Ketene-Imine Cycloaddition in Batch and Flow Mode
Karlsson, Staffan,Bergman, Rolf,L?fberg, Christian,Moore, Peter R.,Pontén, Fritiof,Tholander, Joakim,S?rensen, Henrik
, p. 2067 - 2074 (2016/01/08)
A practical large-scale route to an MCH1 receptor antagonist is described. A Staudinger β-lactam synthesis of an imine and an in situ generated ketene was utilized as a key step for the preparation of a spiro-azetidine building block. The reaction was demonstrated in both batch and flow mode and a comparison of these techniques is described.
Preparation of 1,3,4-Oxadiazol-2-carboxylic Acid Derivatives
Dost, J.,Heschel, M.,Stein, J.
, p. 109 - 116 (2007/10/02)
The synthesis of 5-substituted-1,3,4-oxadiazol-2-carboxylic acid derivatives 3a-g and 4a-g by cyclodehydratation of diacylhydrazines 1a-g and 2a-g are described.Further derivatives 6 to 9 are obtained from 1,3,4-oxadiazol-2-carboxethyl esters 3.
