Double helix-to-double helix transformation, using platinum(II) acetylide complexes as surrogate linkers

Organic Letters

Volumn 8, Issue 12, 2006, Pages 2583-2586

  Furusho, Yoshio ^a   Tanaka, Yoshie ^a   Yashima, Eiji ^a,b  

^a JAPAN SCIENCE AND TECHNOLOGY AGENCY   (Japan)

^b NAGOYA UNIVERSITY   (Japan)

Author keywords

[No Author keywords available]

Indexed keywords

EID: 33745570824     PISSN: 15237060     EISSN: None     Source Type: Journal    
DOI: 10.1021/ol0608294     Document Type: Article

References (35)

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27. See the Supporting Information for details of the synthesis, characterization, and structural transformations of the compounds 3a, 3b, 4a, 4b, 3a-4a, and 3b-4b.
28. 3 showed no concentration dependence from 1.0 down to 0.01 mM. Therefore, it seems unlikely that the broadening of the spectra comes from the monomeric strand-duplex equilibrium of the system.
29. 1H NMR spectra of 3a·4a and 3b·4b, all the signals did not show splits attributable to the diastereomeric pairs within the temperature range of +55 to -40 °C and thereby it is not possible to quantify the diastereomeric excesses of the chiral helices. For the double-stranded helical structures of 3a·4a and 3b·4b optimized by MM calculations, see the Supporting Information.
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32. 3b
33. 3, it seems probable that the ligand exchange reaction occurs without decomplexation.
34. 11 These values correspond to ca. 60% yield of the reductive elimination for each strand.
35. It is reported that the cis isomers of some Pt(II) acetylide complexes undergo oxidatively induced reductive elimination, whereas the trans isomers do not. Sato, M.; Mogi, E.; Kumakura, S. Organometallics 1995, 14, 3157-3159.