7050-16-0Relevant articles and documents
High-solubility triaryl carboborate as well as preparation method and application thereof
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, (2020/10/04)
The invention relates to high-solubility triaryl carboborate as well as a preparation method and application thereof. The structural general formula is shown in the specification. The high-solubilitytriaryl carboborate has the advantages of cheap and easi
Asymmetric hydroxylative phenol dearomatization promoted by chiral binaphthylic and biphenylic iodanes
Bosset, Cyril,Coffinier, Romain,Peixoto, Philippe A.,El Assal, Mourad,Pouysegu, Laurent,Quideau, Stephane,Miqueu, Karinne,Sotiropoulos, Jean-Marc
, p. 9860 - 9864,5 (2014/10/15)
The long-standing quest for chiral hypervalent organoiodine compounds (i.e., iodanes) as metal-free reagents for asymmetric synthesis continues. Although remarkable progress has recently been made in organoiodine-catalyzed reactions using a terminal oxidant in stoichiometric amounts, there is still a significant need for "flaskable" chiral iodane reagents. Herein, we describe the synthesis of new iodobinaphthyls and iodobiphenyls, their successful and selective DMDO-mediated oxidation into either λ3- or λ5-iodanes, and the evaluation of their capacity to promote asymmetric hydroxylative phenol dearomatization (HPD) reactions. Most notably, a C2-symmetrical biphenylic λ5-iodane promoted the HPD-induced conversion of the monoterpene thymol into the corresponding ortho-quinol-based [4+2] cyclodimer (i.e., bis(thymol)) with enantiomeric excesses of up to 94 %.
Self-assembly, spectroscopic, and electrochemical properties of [n]rotaxanes
Ashton,Ballardini,Balzani,Belohradsky,Gandolfi,Philp,Prodi,Raymo,Reddington,Spencer,Stoddart,Venturi,Williams
, p. 4931 - 4951 (2007/10/03)
Synthetic approaches to self-assembling [n]rotaxanes incorporating Π- electron deficient bipyridinium-based dumbbell-shaped components and Π- electron rich hydroquinone-based macrocycles have been developed. In particular, the so-called slippage methodolo
New Triarylmethyl Derivatives: "Blocking Groups" for Rotaxanes and Polyrotaxanes
Gibson, Harry W.,Lee, Sang-Hun,Engen, Paul T.,Lecavalier, Pierre,Sze, Jean,et al.
, p. 3748 - 3756 (2007/10/02)
Five triarylcarbinols (8, three new compounds) were synthesized.Using carbanion chemistry the triarylmethanes (13, five new compounds) made by formic acid reduction of 8 were converted to the ω,ω,ω-triarylalkanols (15, three new compounds) and thence to the chloro (17) and iodo (18) derivatives (five new compounds).Via carbocation chemistry p-(triarylmethyl)phenols (20, two new compounds) and aniline (21, new compound) were produced.Alkylation of 20 yielded alcohol (22), benzylic bromide (23), and carboxy (25) functionalized derivatives.The alcohol, halide, phenol, aniline, and carboxylic acid functionalized triarylmethane compounds are suitable end blocking groups for rotaxanes and polyrotaxanes.
A New Design Strategy for the Self-assembly of Molecular Shuttles
Ashton, Peter R.,Philp, Douglas,Spencer, Neil,Stoddart, J. Fraser
, p. 1124 - 1128 (2007/10/02)
A strategy for the construction of a rotaxane-comprised of a dumbbell-shaped component containing two ?-electron-deficient 4,4'-bipyridinium units encircled by one ?-electron-rich bisparaphenylene-34-crown-10 macrocycle-by a constitutionally determined