Journal ArticleDOI
Enantioselective reductions of aromatic ketones with ammonia-borane complexes of chiral tetraphenyl-18-crown-6 derivatives
TLDR
Enantioselective reductions of prochiral aromatic ketones with adducts formed between ammonia-borane and (2R,3R,11R,12R)-and (2S,3S,11S,12S)-tetraphenyl-1,4,7,10,13,16-hexaoxacyclo-octadecane, (RRRR)-(3) and (SSSS)(3), have afforded the corresponding (S and (R) aromatic secondary alcohols with enantiomericAbstract:
Enantioselective reductions of prochiral aromatic ketones with adducts formed between ammonia-borane and (2R,3R,11R,12R)- and (2S,3S,11S,12S)-tetraphenyl-1,4,7,10,13,16-hexaoxacyclo-octadecane, (RRRR)-(3) and (SSSS)-(3), have afforded the corresponding (S) and (R) aromatic secondary alcohols with enantiomeric excesses of 20–67%.read more
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Journal ArticleDOI
Ruthenium-catalyzed dehydrogenation of ammonia boranes.
TL;DR: It was shown that alkylamine-boranes can serve as a source of H2 in the Ru-catalyzed reduction of ketones and imines in AB and MeAB.
Journal ArticleDOI
Boron–nitrogen–hydrogen (BNH) compounds: recent developments in hydrogen storage, applications in hydrogenation and catalysis, and new syntheses
Zhenguo Huang,Tom Autrey +1 more
TL;DR: The strong efforts devoted to the exploration of BNH compounds for hydrogen storage have led to impressive advances in the field of boron chemistry as mentioned in this paper, and a review summarizes progress in this field from three aspects.
Journal ArticleDOI
A Frustrated Lewis Pair Catalyzed Asymmetric Transfer Hydrogenation of Imines Using Ammonia Borane.
TL;DR: Experimental and theoretical mechanistic studies reveal an interesting 8-membered ring hydrogen transfer transition state and an expected regeneration of reactive species with ammonia borane and a plausible catalytic pathway for this reaction is depicted.
Journal ArticleDOI
Big and little Meccano
TL;DR: The emergence of the mechanical bond during the past 25 years is giving chemistry a fillip in more ways than one as discussed by the authors, and it is providing a new lease of life to chemical synthesis where mechanical bond formation occurs as a consequence of the all-important templation orchestrated by molecular recognition and self-assembly.