162356-89-0Relevant articles and documents
A comparison of shuttling mechanisms in two constitutionally isomeric bistable rotaxane-based sunlight-powered nanomotors
Balzani, Vincenzo,Clemente-Leon, Miguel,Credi, Alberto,Semeraro, Monica,Venturi, Margherita,Tseng, Hsian-Rong,Wenger, Sabine,Saha, Sourav,Stoddart, J. Fraser
, p. 193 - 206 (2006)
To find out how best to optimize shuttling of the macrocycle in a particular class of photochemically driven molecular abacus, which has the molecular structure of BR-I6+ in its Mark I prototype (Ashton et al., Chem. Eur. J. 2000, 6, 3558), we
Multistep synthesis of complex boronic acids from simple MIDA boronates
Gillis, Eric P.,Burke, Martin D.
supporting information; experimental part, p. 14084 - 14085 (2009/03/11)
Due to its sensitivity to most synthetic reagents, it is typically necessary to introduce the boronic acid functional group just prior to its utilization. Overcoming this important limitation, we herein report that air- and chromatographically stable MIDA boronates are compatible with a wide range of common reagents which enables the multistep synthesis of complex boronic acid building blocks from simple B-containing starting materials. X-ray and variable temperature NMR studies link the unique stability of MIDA boronates to a kinetic inaccessibility of the potentially reactive boron p-orbital and/or nitrogen lone pair. These findings were collectively harnessed to achieve a short and modular total synthesis of (+)-crocacin C via the iterative cross-coupling of a structurally complex, MIDA-protected haloboronic acid building block. Copyright
A convergent asymmetric synthesis of a growth hormone secretagogue
Zheng, Nan,Armstrong III, Joseph D.,Eng, Kan K.,Keller, Jennifer,Liu, Tom,Purick, Robert,Lynch, Joseph,Hartner, Frederick W.,Volante
, p. 3435 - 3446 (2007/10/03)
Described herein is a convergent asymmetric synthesis of growth hormone secretagogue (GHS) suitable for large-scale preparations. Key features include: (1) an improved method for α-iodination of a lactam; (2) a novel synthesis of a disubstituted urea usin
A photochemically driven molecular-level abacus
Ashton, Peter R.,Ballardini, Roberto,Balzani, Vincenzo,Credi, Alberto,Dress, Klaus Ruprecht,Ishow, Elena,Kleverlaan, Cornelis J.,Kocian, Oldrich,Preece, Jon A.,Spencer, Neil,Stoddart, J. Fraser,Venturi, Margherita,Wenger, Sabine
, p. 3558 - 3574 (2007/10/03)
A molecular-level abacus-like system driven by light inputs has been designed in the form of a [2]rotaxane, comprising the π-electron-donating macrocyclic polyether bis-p-phenylene-34-crown-10 (BPP34C10) and a dumb-bell-shaped component that contains 1) a
Benzo-fused lactams promote release of growth hormone
-
, (2008/06/13)
There are disclosed certain novel compounds identified as benzo-fused lactams which promote the release of growth hormone in humans and animals. This property can be utilized to promote the growth of food animals to render the production of edible meat products more efficient, and in humans, to increase the stature of those afflicted with a lack of a normal secretion of natural growth hormone. The compounds are prepared by substitution of an amino-lactam with a substituted amide function. Growth promoting compositions containing such bezno-fused lactams as the active ingredient thereof are also disclosed. STR1 where L is STR2