A domino [3 + 2] cycloaddition/deamination/imine hydrolysis reaction of cyclopropyl spirooxindoles with thiourea for access to spiro-γ-thiolactone oxindoles†
Hai-Ting Wang, Xiao-Lin Wen, Xiao-Lin Xu, Dong-Chao Wang and Hai-Ming Guo
{"title":"A domino [3 + 2] cycloaddition/deamination/imine hydrolysis reaction of cyclopropyl spirooxindoles with thiourea for access to spiro-γ-thiolactone oxindoles†","authors":"Hai-Ting Wang, Xiao-Lin Wen, Xiao-Lin Xu, Dong-Chao Wang and Hai-Ming Guo","doi":"10.1039/D4QO00833B","DOIUrl":null,"url":null,"abstract":"<p >A domino [3 + 2] cycloaddition/deamination/imine hydrolysis reaction of D–A cyclopropane with inexpensive thiourea catalyzed by Lu(OTf)<small><sub>3</sub></small> has been developed. A series of γ-thiolactone spirooxindole compounds with potential biological activity were obtained in up to 98% yields. Experiments to investigate the mechanism showed that γ-thiolactone products were from the hydrolysis of the imine intermediates. In addition, the asymmetric catalytic reaction of D–A cyclopropane and thiourea has been successfully developed to afford spiro-γ-thiolactone compounds with good enantioselectivities (up to 98% ee). The utility of this method was showcased by the facile transformation and biological activity of products.</p>","PeriodicalId":97,"journal":{"name":"Organic Chemistry Frontiers","volume":null,"pages":null},"PeriodicalIF":4.6000,"publicationDate":"2024-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Organic Chemistry Frontiers","FirstCategoryId":"92","ListUrlMain":"https://pubs.rsc.org/en/content/articlelanding/2024/qo/d4qo00833b","RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CHEMISTRY, ORGANIC","Score":null,"Total":0}
引用次数: 0
Abstract
A domino [3 + 2] cycloaddition/deamination/imine hydrolysis reaction of D–A cyclopropane with inexpensive thiourea catalyzed by Lu(OTf)3 has been developed. A series of γ-thiolactone spirooxindole compounds with potential biological activity were obtained in up to 98% yields. Experiments to investigate the mechanism showed that γ-thiolactone products were from the hydrolysis of the imine intermediates. In addition, the asymmetric catalytic reaction of D–A cyclopropane and thiourea has been successfully developed to afford spiro-γ-thiolactone compounds with good enantioselectivities (up to 98% ee). The utility of this method was showcased by the facile transformation and biological activity of products.
期刊介绍:
Organic Chemistry Frontiers is an esteemed journal that publishes high-quality research across the field of organic chemistry. It places a significant emphasis on studies that contribute substantially to the field by introducing new or significantly improved protocols and methodologies. The journal covers a wide array of topics which include, but are not limited to, organic synthesis, the development of synthetic methodologies, catalysis, natural products, functional organic materials, supramolecular and macromolecular chemistry, as well as physical and computational organic chemistry.