{"title":"Catalytic asymmetric approach to floral odorant, (+)- and (−)-Florhydral","authors":"Debabrata Mondal , Dhruvilkumar Sureshkumar Patel , Vishnumaya Bisai","doi":"10.1016/j.tetlet.2025.155688","DOIUrl":null,"url":null,"abstract":"<div><div>Catalytic asymmetric total synthesis of either enantiomer of floral odorant, i.e. (+)-florhydral® (<strong>1a</strong>) and (−)-florhydral® (<em>ent</em>-<strong>1a</strong>) has been achieved via a key catalytic asymmetric 3-isopropyl benzene boronic acid addition onto ethyl crotonate. Thus, an efficient two-step approach to both enantiomers of florhydral has been shown using 2 mol% Rh-(<em>S</em>)-BINAP (<strong>L1</strong>) as catalyst to achieve the product with a stereogenic center at the pseudo-benzylic position (up to 90 % ee).</div></div>","PeriodicalId":438,"journal":{"name":"Tetrahedron Letters","volume":"168 ","pages":"Article 155688"},"PeriodicalIF":1.5000,"publicationDate":"2025-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Tetrahedron Letters","FirstCategoryId":"92","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0040403925002370","RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"CHEMISTRY, ORGANIC","Score":null,"Total":0}
引用次数: 0
Abstract
Catalytic asymmetric total synthesis of either enantiomer of floral odorant, i.e. (+)-florhydral® (1a) and (−)-florhydral® (ent-1a) has been achieved via a key catalytic asymmetric 3-isopropyl benzene boronic acid addition onto ethyl crotonate. Thus, an efficient two-step approach to both enantiomers of florhydral has been shown using 2 mol% Rh-(S)-BINAP (L1) as catalyst to achieve the product with a stereogenic center at the pseudo-benzylic position (up to 90 % ee).
期刊介绍:
Tetrahedron Letters provides maximum dissemination of outstanding developments in organic chemistry. The journal is published weekly and covers developments in techniques, structures, methods and conclusions in experimental and theoretical organic chemistry. Rapid publication of timely and significant research results enables researchers from all over the world to transmit quickly their new contributions to large, international audiences.