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- Title
Synthesis and Applications of (ONO Pincer)Ruthenium-Complex-Bound Norvalines.
- Authors
Isozaki, Katsuhiro; Yokoi, Tomoya; Yoshida, Ryota; Ogata, Kazuki; Hashizume, Daisuke; Yasuda, Nobuhiro; Sadakane, Koichiro; Takaya, Hikaru; Nakamura, Masaharu
- Abstract
Two (ONO pincer)ruthenium-complex-bound norvalines, Boc−[Ru(pydc)(terpy)]Nva−OMe ( 1; Boc= tert-butyloxycarbonyl, terpy=terpyridyl, Nva=norvaline) and Boc−[Ru(pydc)( tBu-terpy)]Nva−OMe ( 5), were successfully synthesized and their molecular structures and absolute configurations were unequivocally determined by single-crystal X-ray diffraction. The robustness of the pincer Ru complexes and norvaline scaffolds against acidic/basic, oxidizing, and high-temperature conditions enabled us to perform selective transformations of the N-Boc and C−OMe termini into various functional groups, such as alkyl amide, alkyl urea, and polyether groups, without the loss of the Ru center or enantiomeric purity. The resulting dialkylated Ru-bound norvaline, n-C11H23CO− l-[Ru(pydc)(terpy)]Nva−NH- n-C11H23 ( l- 4) was found to have excellent self-assembly properties in organic solvents, thereby affording the corresponding supramolecular gels. Ru-bound norvaline l- 1 exhibited a higher catalytic activity for the oxidation of alcohols by H2O2 than parent complex [Ru(pydc)(terpy)] ( 11 a).
- Subjects
RUTHENIUM; X-ray diffraction; ORGANOMETALLIC compounds; PHOTODEGRADATION; PALLADIUM isotopes
- Publication
Chemistry - An Asian Journal, 2016, Vol 11, Issue 7, p1076
- ISSN
1861-4728
- Publication type
Article
- DOI
10.1002/asia.201600045