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手性离子对有机催化剂促进烯丙醇的高度对映选择性3-碘环醚化反应。

Chiral ion-pair organocatalyst promotes highly enantioselective 3- iodo-cycloetherification of allyl alcohols.

作者信息

Shen Zhigao, Pan Xixian, Lai Yisheng, Hu Jiadong, Wan Xiaolong, Li Xiaoge, Zhang Hui, Xie Weiqing

机构信息

Shaanxi Key Laboratory of Natural Products & Chemical Biology , College of Science , Northwest A&F University , 22 Xinong Road , Yangling 712100 , China . Email:

State Key Laboratory of Natural Medicines , Jiangsu Key Laboratory of Drug Discovery for Metabolic Diseases , Center of Drug Discovery , China Pharmaceutical University , 24 Tongjiaxiang , Nanjing 210009 , China.

出版信息

Chem Sci. 2015 Dec 1;6(12):6986-6990. doi: 10.1039/c5sc02485d. Epub 2015 Aug 27.

DOI:10.1039/c5sc02485d
PMID:29861937
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC5947518/
Abstract

By designing a novel chiral ion-pair organocatalyst composed of chiral phosphate and DABCO-derived quaternary ammonium, highly enantioselective 3- iodo-cycloetherification of allyl alcohols was achieved using NIS as a halogen source. Based on this reaction, one-pot asymmetric 3- iodo-cycloetherification/Wagner-Meerwein rearrangement of allyl alcohols en route to enantioenriched 2-iodomethyl-2-aryl cycloalkanones was subsequently developed. Due to the participation of adjacent iodine, the Wagner-Meerwein rearrangement of 2-iodomethyl-2-aryl epoxide proceeds with unusual retention of stereoconfiguration.

摘要

通过设计一种由手性磷酸和DABCO衍生的季铵盐组成的新型手性离子对有机催化剂,以NIS作为卤素源实现了烯丙醇的高对映选择性3-碘环醚化反应。基于该反应,随后开发了烯丙醇的一锅法不对称3-碘环醚化/瓦格纳-米尔温重排反应,用于合成对映体富集的2-碘甲基-2-芳基环烷酮。由于相邻碘的参与,2-碘甲基-2-芳基环氧化物的瓦格纳-米尔温重排反应以不寻常的立体构型保持方式进行。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a4e3/5947518/d21b1a00beaf/c5sc02485d-s3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a4e3/5947518/12c9e3d23f6c/c5sc02485d-f1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a4e3/5947518/b2cfd674647a/c5sc02485d-s1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a4e3/5947518/4bf640dcbc87/c5sc02485d-s2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a4e3/5947518/d21b1a00beaf/c5sc02485d-s3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a4e3/5947518/12c9e3d23f6c/c5sc02485d-f1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a4e3/5947518/b2cfd674647a/c5sc02485d-s1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a4e3/5947518/4bf640dcbc87/c5sc02485d-s2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a4e3/5947518/d21b1a00beaf/c5sc02485d-s3.jpg

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