21150-82-3

Upstream product

• 111-26-2 hexan-1-amine 
• 111-50-2 Adipic acid dichloride 
• 629-11-8 1,6-hexanediol 
• 124-04-9 Adipic acid 

Downstream Products

• 629-11-8 1,6-hexanediol 
• 111-26-2 hexan-1-amine 

Relevant academic research and scientific papers

Bis-diazeniumdiolates of dialkyldiamines: Enhanced nitric oxide loading of parent diamines

(Chemical Equation Presented) The synthesis and characterization of a series of symmetric bis-dialkyldiamine-based diazeniumdiolates, RN[N(O)NO -Na+](CH2)xN[N(O)NO -Na+]R′, are reported. Preparation of corresponding intramolecular diazeniumdiolates of the form RN[N(O)NO]-(CH 2)xNH2+R′ with alkyl groups > (CH2)4CH3 have been shown previously to lack stability. In contrast, sodium-stabilized bis-diazeniumdiolates of such lipophilic species can be readily formed when these same diamines are reacted with NO in basic media. The resulting compounds release 4 mol of NO per mole of original diamine. This approach enables the synthesis of more lipophilic NO donors than previously possible.

An efficient N-heterocyclic carbene based ruthenium-catalyst: Application towards the synthesis of esters and amides

A highly stable benzimidazolylidene based N-heterocyclic carbene (NHC) ruthenium catalyst was prepared starting with readily accessible starting materials. Under inert gas atmosphere and in air the catalyst showed high activity for the direct synthesis of esters from primary alcohols and of amides from primary alcohols and amines. Di-, tri-, and oligo-amides were obtained by using specific starting materials.

Self-assembly and dynamics of [2]- and [3]rotaxanes with a dinuclear macrocycle containing reversible Os-N coordinate bonds

With a dinuclear macrocycle 2 that contains weak reversible OsVI-N coordinate bonds, self-assembly and equilibrium dynamics of [2]- and [3]rotaxanes have been investigated. When the macrocycle 2 was mixed together with threads 4a-e, which all contain an adipamide station but different sizes of end groups, [2]pseudorotaxane- and rotaxane-like complexes were immediately formed with large association constants > of 7 × 103M-1 in CDCl3 at 298 K. Exchange dynamics, explored by 2D-EXSY experiments, suggest that assembly and disassembly of complexes occur through two distinct pathways, slipping or clipping, and this depends on the size of the end groups. The slipping pathway is predominant with smaller end groups that give pseudorotaxane-like complexes, while the clipping pathway is observed with larger end groups that yield rotaxane-like complexes. Under the same conditions, exchange barriers (ΔG≠) were 14.3 kcal mol-1 for 4a and 16.7 kcal mol-1 for 4d, and indicate that the slipping process is at least one order of magnitude faster than the clipping process. Using threads 13a and 13b that contain two adipamide groups, more complicated systems have been investigated in which [2]rotaxane, [3]rotaxane, and free components are in equilibrium. Concentration- and temperature-dependent 1H NMR spectroscopic studies allowed the identification of all possible elements and the determination of their relative distributions in solution. For example, the relative distribution of the free components, [2]rotaxane, and [3]rotaxane are 30, 45, and 25%, respectively, in a mixture of 2 (2mM) and 13a (2mM) in CDCl3, at 10°C. However, [3]rotaxane exists nearly quantitatively in a mixture of 2 (4mM) and 13a (2mM) in CDCl3 at a low temperature - 10°C.