期刊
TETRAHEDRON LETTERS
卷 55, 期 10, 页码 1760-1764出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.tetlet.2014.01.108
关键词
Resolution; Bis-oxazine; CD and CPL study
资金
- Council of Scientific and Industrial Research (CSIR), New Delhi [01(2386)/10/EMR-II]
- National Institute of Health [1 SC3 GM089589-04, 3 S06 GM008192-27S1]
- Henry Dreyfus Teacher-Scholar Award
- NIH (RISE Grant) [5R25GM071381]
A racemic sample of 2,2',7,7'-tetrahydroxy-1,1'-binaphthyl was resolved with (S)-proline and the separated enantiomers were independently converted to atropisomeric bis-oxazines by aromatic Mannich reaction. These chirally pure oxazines were then converted to the helicene like cyclic ethers. The circularly polarized luminescence (CPL) profile was consistent with the isolation of the targeted helical-like molecules in optically pure form, prepared from the achiral primary amines. The compounds of interest displayed active and opposite CPL activities for each set of the helicene like isomers (P)-/(M)-3 and (P)-/(M)-5. (c) 2014 Elsevier Ltd. All rights reserved.
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