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Selective Ring-Opening of N-Alkyl Pyrrolidines with Chloroformates to 4-Chlorobutyl Carbamates
- Title
- Selective Ring-Opening of N-Alkyl Pyrrolidines with Chloroformates to 4-Chlorobutyl Carbamates
- Authors
- Yu, Chunghyeon; Shoaib, Mahbubul Alam; Iqbal, Naeem; Kim, Jun Soo; Ha, Hyun-Joon; Cho, Eun Jin
- Ewha Authors
- 김준수
- SCOPUS Author ID
- 김준수
- Issue Date
- 2017
- Journal Title
- JOURNAL OF ORGANIC CHEMISTRY
- ISSN
- 0022-3263
- Citation
- JOURNAL OF ORGANIC CHEMISTRY vol. 82, no. 13, pp. 6615 - 6620
- Publisher
- AMER CHEMICAL SOC
- Indexed
- SCIE; SCOPUS
- Document Type
- Article
- Abstract
- Our study shows that among aza-heterocycles of various ring sizes, including aziridines, azetidines, pyrrolidines, and piperidines, only N-alkyl pyrrolidines undergo competitive reaction pathways with chloroformates to yield N-dealkylated pyrrolidines and 4-chlorobutyl carbamates. The pathway taken depends on the substituent on the nitrogen, i.e., ring-opening with methyl and ethyl substituents and dealkylation with a benzyl substituent. Computational calculations support the substituent-dependent product formation by showing the energy difference between, the transition states of both reaction pathways. Selective ring-opening reactions of N-methyl and N-ethyl pyrrolidine derivatives with chloroformates were utilized to prepare various 4-chlorobutyl carbamate derivatives as valuable 1,4-bifunctional compounds.
- DOI
- 10.1021/acs.joc.7b00681
- Appears in Collections:
- 자연과학대학 > 화학·나노과학전공 > Journal papers
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