Appasaheb K. Nirpal , Dnyaneshwar A. Gorve , Raju Silver , Steven P. Kelley , Shyam Sathyamoorthi
{"title":"Tethered aza-Wacker cyclization reactions with unusual N-alkoxy carbamates","authors":"Appasaheb K. Nirpal , Dnyaneshwar A. Gorve , Raju Silver , Steven P. Kelley , Shyam Sathyamoorthi","doi":"10.1016/j.tet.2025.134730","DOIUrl":null,"url":null,"abstract":"<div><div>Substrates with <em>N</em>-alkoxy carbamate “heads” and olefin “tails” can be productively cyclized into 1,3-oxazinan-2-one products bearing pendant alkenes. Our reaction protocol is operationally simple and involves heating the substrate with a mixture of Pd (II) and Cu (II) salts in CH<sub>3</sub>CN under 1 atm of O<sub>2</sub>. We hypothesize that an <em>aza</em>-Wacker mechanism is operative, based on prior art and our own experience with this reaction class. An array of substrates is compatible, and the heterocyclic products are amenable to further transformations.</div></div>","PeriodicalId":437,"journal":{"name":"Tetrahedron","volume":"183 ","pages":"Article 134730"},"PeriodicalIF":2.1000,"publicationDate":"2025-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Tetrahedron","FirstCategoryId":"92","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0040402025002868","RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"CHEMISTRY, ORGANIC","Score":null,"Total":0}
引用次数: 0
Abstract
Substrates with N-alkoxy carbamate “heads” and olefin “tails” can be productively cyclized into 1,3-oxazinan-2-one products bearing pendant alkenes. Our reaction protocol is operationally simple and involves heating the substrate with a mixture of Pd (II) and Cu (II) salts in CH3CN under 1 atm of O2. We hypothesize that an aza-Wacker mechanism is operative, based on prior art and our own experience with this reaction class. An array of substrates is compatible, and the heterocyclic products are amenable to further transformations.
期刊介绍:
Tetrahedron publishes full accounts of research having outstanding significance in the broad field of organic chemistry and its related disciplines, such as organic materials and bio-organic chemistry.
Regular papers in Tetrahedron are expected to represent detailed accounts of an original study having substantially greater scope and details than that found in a communication, as published in Tetrahedron Letters.
Tetrahedron also publishes thematic collections of papers as special issues and ''Reports'', commissioned in-depth reviews providing a comprehensive overview of a research area.