期刊
JOURNAL OF MOLECULAR LIQUIDS
卷 249, 期 -, 页码 949-952出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.molliq.2017.11.116
关键词
Halogen bonding; Hydrogen bonding; Wagner-Meerwein rearrangement; Halogenation; 3a,6-epoxyisoindole
资金
- Ministry of Education and Science of the Russian Federation [4.1154.2017/4.6]
- Fundacao para a Ciencia e a Tecnologia (FCT), Portugal [UID/QUI/00100/2013]
- National Science Foundation [DMR0934212, DMR 1523611 PREM]
Reaction of (3aRS,6SR,7aRS)-6-substituted 2-phenyl-2,3,7,7a-tetrahydro-3a,6-epoxyisoindo1-1(6H)-ones (1-3) with ICI (or Br-2) in CH2Cl2 yields to halogenated Wagner-Meerwein rearrangement products, 4,5-(or 4,5,6)-halo-2-phenyloctahydro-4,6-epoxycyclopenta[c]pyridin-1-ones, with moderate yields (40-43%) of 4-6. All these polyhalogenated compounds are formed exclusively in the syn diastereomeric form relatively to halogen atoms at 4 and 5 positions of molecule. In 4-6 the halogenated carbon atoms exist as the S-stereogenic centers. The CI center dot center dot center dot CI and Cl center dot center dot center dot I types of halogen binding were found in the structures of 5 and 6, respectively, whereas molecules of 4 are stabilized in crystal by multiple hydrogen bonding. (C) 2017 Elsevier B.V. All rights reserved.
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