{"title":"Continuous-flow synthesis of 7-methoxy-1-tetralone: an important intermediate of (-)-Dezocine","authors":"Liangchuan Lai, Liang Gao, Minjie Liu, Yongxing Guo, Dang Cheng, Meifen Jiang, Fener Chen","doi":"10.1007/s41981-023-00274-0","DOIUrl":null,"url":null,"abstract":"<div><p>\nContinuous flow technology has been widely adopted in manufacturing active pharmaceutical ingredients (APIs). Herein, we report an expeditious multi-step continuous-flow strategy for an efficient and highly productive flow synthesis of 7-methoxy-1-tetralone, which is an essential intermediate for the opioid analgesic drug (-)-dezocine. Compared with the traditional batch operation, this work presents significant advantages of continuous-flow chemistry with dramatically reduced reaction time, highly improved reaction efficiency, good controls over reaction optimizing conditions, etc. The flow protocol in this work provided the desired product in an overall yield of up to 76.6% with 99% purity, much higher than those from batch process (i.e., 50% yield, 92% purity). Moreover, reaction efficiency is highly improved with a throughput of 0.49 g/h, the total reaction time is markedly reduced from hours in batch to minutes in flow process.</p><h3>Graphical abstract</h3>\n<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":630,"journal":{"name":"Journal of Flow Chemistry","volume":"13 4","pages":"375 - 383"},"PeriodicalIF":2.0000,"publicationDate":"2023-07-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Flow Chemistry","FirstCategoryId":"92","ListUrlMain":"https://link.springer.com/article/10.1007/s41981-023-00274-0","RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"CHEMISTRY, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0
Abstract
Continuous flow technology has been widely adopted in manufacturing active pharmaceutical ingredients (APIs). Herein, we report an expeditious multi-step continuous-flow strategy for an efficient and highly productive flow synthesis of 7-methoxy-1-tetralone, which is an essential intermediate for the opioid analgesic drug (-)-dezocine. Compared with the traditional batch operation, this work presents significant advantages of continuous-flow chemistry with dramatically reduced reaction time, highly improved reaction efficiency, good controls over reaction optimizing conditions, etc. The flow protocol in this work provided the desired product in an overall yield of up to 76.6% with 99% purity, much higher than those from batch process (i.e., 50% yield, 92% purity). Moreover, reaction efficiency is highly improved with a throughput of 0.49 g/h, the total reaction time is markedly reduced from hours in batch to minutes in flow process.
期刊介绍：
The main focus of the journal is flow chemistry in inorganic, organic, analytical and process chemistry in the academic research as well as in applied research and development in the pharmaceutical, agrochemical, fine-chemical, petro- chemical, fragrance industry.
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