38946-25-7

Upstream product

• 37942-07-7 3,5-di-tert-butyl-2-hydroxybenzaldehyde 
• 108-00-9 N,N-dimethylethylenediamine 
• 96-76-4 2,4-di-tert-Butylphenol 
• 188713-27-1 N,N-bis(3,5-di-t-butyl-2-hydroxybenzyl)-N',N'-dimethylethylenediamine 
• 50-00-0 formaldehyd 
• 142-25-6 N,N',N'-trimethylenediamine 

Downstream Products

• 188713-27-1 N,N-bis(3,5-di-t-butyl-2-hydroxybenzyl)-N',N'-dimethylethylenediamine 
• 188713-26-0 2,4-di-tert-butyl-6-([(2-dimethylaminoethyl)-(2-hydroxybenzyl)-amino]-methyl)-phenol 

Relevant academic research and scientific papers

Titanium complexes bearing amine bis(phenolate) ligands: Synthesis, structure and catalysis in ring-opening polymerization of lactide

Monomeric bis(isopropoxy) titanium complexes LTi(OiPr)2 (L?=?─OC6H2–4-R1–6-R2–2-CH2N[(CH2)2N(R3)2]CH2–4-R4–6-R5-C6H2O─, R1?=?R2?=?tBu, R3?=?Et, R4?=?R5?=?Cl, (L1)Ti(OiPr)2; R1?=?R2?=?Me, R3?=?Et, R4?=?R5?=?Me, (L2)Ti(OiPr)2; R1?=?R2?=?tBu, R3?=?Et, R4?=?OMe, R5?=?tBu, (L3)Ti(OiPr)2; R1?=?R4?=?OMe, R3?=?Et, R2?=?R5?=?tBu, (L4)Ti(OiPr)2; R1?=?R2?=?tBu, R3?=?Me, R4?=?OMe, R5?=?tBu, (L5)Ti(OiPr)2) supported by amine bis(phenolate) ligands were synthesized and characterized using NMR spectroscopy and elemental analysis. The solid-state structure of (L3)Ti(OiPr)2 was determined using single-crystal X-ray diffraction. (L1 –5)Ti(OiPr)2 were all found to initiate the ring-opening polymerization of l-lactide and rac-lactide in a controlled manner at 110–160°C. As shown by kinetic studies, (L1)Ti(OiPr)2 polymerized l-lactide faster than did (L2 –5)Ti(OiPr)2. In addition, good number-average molecular weight and narrow polydispersity index (1.00–1.71) of polymers were also obtained. The microstructure of the polymers and a possible mechanism of coordination–insertion of polymerization were evidenced by MALDI-TOF and 1H NMR spectra of the polylactides.

Complexity of imine and amine Schiff-base tin(ii) complexes: Drastic differences of amino and pyridyl side arms

A series of homoleptic and heteroleptic imine and amine Schiff-base tin(ii) complexes containing dimethylamino and pyridyl side arms were synthesized and structurally characterized. While the tin complexes containing the dimethylamino side arm could be prepared in good yield, unusual cyclodimerization and ligand dimerization were observed for the first time for Schiff-base tin complexes having a pyridyl side arm due to the added stabilization offered by the pyridyl ring. The amine Schiff-base tin(ii) complexes were active for the ring-opening copolymerization of succinic anhydride (SA) and cyclohexene oxide (CHO) at 110 °C giving highly alternating poly(SA-alt-CHO). This journal is

Synthesis method of dimethyl ethylenediamine tert-butylphenol

The invention discloses a synthesis method of dimethyl ethylenediamine tert-butylphenol. The synthesis method comprises the steps of: (1) dissolving 3,5-di-tert-butylsalicylaldehyde into anhydrous ethanol, carrying out filtering and dropwise adding a glac

Living/controlled ring-opening (co)polymerization of lactones by Al-based catalysts with different sidearms

It remains a challenging task to synthesize well-defined multi-block copolymers through the controlled/living ring-opening polymerization (ROP) of lactones without transesterification, the most common side reaction occurring during copolymerization. A ser

Solvent dependent disproportionation of Cu(II) complexes of N2O2-type ligands: Direct evidence of formation of phenoxyl radical: An experimental and computational study

Four Cu(II) complexes (1, 2, 3 and 4) with N2O2-type ligand, H2L1, H2L2, H2L3 and H2L4, respectively have been synthesized as the functional model for galactose oxidase. In presence of acetonitrile the Cu(II) centres in the complexes, undergo reduction with simultaneous oxidation of the ligands. The ligand oxidized products are isolated and characterized. Spectroscopic studies indicate that this disproportionation goes through the formation of a Cu(II)-phenoxyl intermediate. The complexes also undergoes the same reaction with pyridine, which indicates the involvement of the exergonic N-donor ligand for the formation of Cu(II)-phenoxyl complex. The Cu(II)-phenoxyl complexes are found to be stable in methanol in presence of a strong base. The paramagnetic centers in the Cu(II)-phenoxyl complexes were found to be weakly ferromagnetically coupled. The complexes, in acetonitrile solvent, have been found to oxidize primary alcohols to corresponding aldehydes. In absence of single crystal structures of the complexes, we optimized the structures using density functional theory (DFT). The UV-visible peaks of complexes as found from time dependent density functional theory (TDDFT) calculations match well with the observed experimental results.

Dimeric μ-oxo bridged molybdenum(vi) dioxo complexes as catalysts in the epoxidation of internal and terminal alkenes

The preparation of the tridentate phenol based amine ligands HL1-HL4 is achieved via a convenient one-pot synthesis by reductive amination in quantitative yield in an autoclave under 7 bar H2 gas. Reaction of [MoO2(acac)2] and the corresponding ligand HLX (X = 1, 2 and 4) in methanol-H2O results in the formation of orange to red dimeric μ-oxo bridged [{MoO2(LX)}2(μ-O)] (X = 1, 2 and 4) complexes 1-3 in high yield and high purity. Complexes 1-3 are stable towards air and water. Both ligands coordinate via the phenolic O atom, the amine N atom and the third donor atom in the side chain (OMe for 1 and NMe 2 for 2 and 3) in a fac mode to the metal center. The molybdenum atoms are linked by a bridging μ-oxo moiety to each other as confirmed by X-ray diffraction analyses of complexes 2 and 3. All complexes have been tested in the epoxidation of several internal and terminal alkenes using TBHP as an oxidant. Depending on the nature of the substrate, the epoxides are obtained in moderate to good yields and high selectivities. In the epoxidation of cyclooctene a TOF = 467 h-1 with complex 1 has been observed, significantly higher compared to other dimeric complexes reported in the literature. In the more challenging epoxidation of styrene, complexes 1 and 2 have proven to be highly selective as only the formation of styrene oxide is observed. The OMe based complex 1 has also proven to be more active than the NMe2 based counterparts 2 and 3. The basic conditions induced by the NMe2 groups in complexes 2 and 3 lower their catalytic activity.

Mononuclear and Mixed-Valence Trinuclear Manganese Complexes Containing Tripodal Tetradentate Ligands. Phenolato, Carboxylato, and Alkoxo Bridges

Manganese complexes containing tripodal tetradentate ligands with an N2O2 donor set (H2L1: N,N-bis(2-hydroxybenzyl)-N′,N′-dimethylethylenediamine, H2L2: N-(3,5-di-t-butyl-2-hydroxybenzyl)-N