Iron-Catalyzed Ring Expansion of Cyclobutanols for the Synthesis of 1-Pyrrolines by Using MsONH<sub>3</sub>OTf
作者:Daijiao Zhuang、Tharcisse Gatera、Zhenyu An、Rulong Yan
DOI:10.1021/acs.orglett.1c04304
日期:2022.1.21
The synthesis of 1-pyrrolinesfrom cyclobutanol derivatives and an aminating reagent (MsONH3OTf) has been developed. This one-pot procedure achieves C–N bond/C═N bond formation via ring expansion. A series of 1-pyrroline derivatives are synthesized in moderate to good yields under mild conditions.
Electronic and steric effects on the intramolecular Schmidt reaction of alkyl azides with secondary benzyl alcohols
作者:Xiaowei Sun、Chengzhe Gao、Fan Zhang、Zhuang Song、Lingyi Kong、Xiaoan Wen、Hongbin Sun
DOI:10.1016/j.tet.2013.11.098
日期:2014.1
The intramolecular Schmidt reaction of simple azido secondary benzyl alcohols has been realized for the first time. Investigation of the electronic and steric effects of the substrates on the product outcome was conducted. Unique intramolecular Schmidt rearrangements were observed with the formation of a cinnamaldehyde derivative and aryl aldehydes, respectively. Using this protocol, an efficient synthesis
We herein report an efficient and systematic synthesis of 1-pyrrolines from cyclobutyl azides under thermal and neutral conditions. The reaction proceeded without any additional reagents, and nitrogen was generated as the sole by-product. Furthermore, the generated 1-pyrrolines could be continuously transformed into pyrroles, N-Boc-amines, and oxaziridines in an one-pot manner.