27675-32-7

Upstream product

• 106-44-5 p-cresol 
• 3236-63-3 2,2'-methylenebis(4-methylphenol) 
• 17450-22-5 bis(4-methylphenylamino)methane 
• 73086-50-7 2-amino-5-methyl-N-tolylbenzylamine 
• 540-23-8 p-toluidine hydrochloride 
• 106-49-0 p-toluidine 

Downstream Products

• 114660-20-7 2,2'-methylenebis(N-acetyl-p-toluidine) 
• 253797-06-7 2-phenoxy-1,3-dihydro-4,5;7,8-dibenzo-11,11'-dimethyl-1,3,2-diazaphosphocane 
• 288393-25-9 N,N'-diisopropyl-2,2'-methylene-bis-p-toluidine 
• 114660-19-4 6-<2-<2-amino-5-methylbenzyl>-4-methylanilino>-5,6,7,12-tetrahydro-2,10-dimethyldibenzo<1,3,2>diazaphosphocine 6-sulphide 
• 114681-19-5 C₄₅H₄₈N₆P₂S₂ 
• 97188-70-0 3-(2-amino-5-methylphenyl)-5-methyl-2,1-benzisothiazole 

Relevant academic research and scientific papers

Lignin-based diphenylmethane diisocyanate as well as preparation method and application thereof

The invention discloses a lignin-based diphenylmethane diisocyanate and a preparation method and application thereof. As shown in Formula I, the lignin-based diphenylmethane diisocyanate is prepared by reacting a lignin-cracking monomer compound II with a carbonyl compound to give compound III, compound III reacts with chloroacetyl ammonia to obtain compound IV, compound IV is subjected Smiles rearrangement reaction to obtain compound V, and compound V is reacted with a compound containing carbon-containing acid to obtain the lignin-based diphenylmethane diisocyanate shown in formula I. The product replaces MDI for synthesis of polyurethane materials, and the toughness of the polyurethane material is improved. Thermal stability and glass transition temperature. When being applied to polyurethane waterproof coating, the water absorption rate is obviously reduced, and the stability of the coating is improved.

Phosphorus-Nitrogen Compounds. Part 49. The Synthesis and Mechanism of Formation of 6-Chloro-5,6,7,12-tetrahydro-2,5,7,10-tetramethyldibenzo-diazaphosphocine 6-Oxide and 6-Sulphide

A reaction mechanism is proposed for the formation of the title compounds in the reactions between N,N-dimethyl-p-toluidine and phosphoryl and thiophosphoryl chlorides.The synthesis of 2,2'-methylenebis(p-toluidine) and 2,2'-methylenebis(N-methyl-p-toluidine) are described, as are their reactions with phosphoryl and thiophosphoryl chlorides.

The preparation of some fused isothiazole derivatives

The treatment of di(2-amino-5-methylphenyl)methane with N-sulfinylmethanesulfonamide gives two materials, 3-(2-amino-5-methylphenyl)-5-methyl-2,1-benzisothiazole and what appears to be its tautomer, a 2,1-benzisothiazolo-2,1-benzisothiazole derivative.Reaction of the former with methyl iodide gives mono-, di-, and trimethyl derivatives.The second of these also possesses the symmetrical 2,1-benzisothiazolo-2,1-benzisothiazole structure.The structure of the other methylation product and of the acetylation products are discussed.Some 1,2-dithiol-3-ylidene-2-pyridylmethanes were made by condensation of 3-alkylthio-1,2-dithiolium salts with methyl 2-pyridylacetate.These demonstrate little sulfur-nitrogen interaction. 3-Methylthio-4-phenyl-1,2-dithiolium iodide reacts anomalously with methyl 2-pyridylacetate to form a quinolizinethione. 1,2-Benzisothiazolopyridinium triiodide was made by iodine oxidation of 2-(2-mercaptophenylpyridine).

Aromatic Amines and their Derivatives. Part 3. The Synthesis and Crystal Structure of 4,4'-NN'-Tetramethyl-NN'-dinitroso-2,2'-methylenedianiline

The synthesis of 4,4',NN'-tetramethyl-NN'-dinitroso-2,2'-methylenedianiline (1) by the route p-MeC6H4NH2 + HCHO + OH- ---> (p-MeC6H4NMe)2CH2 (7b); (7b) + acid at 70 deg C ---> 4,N-dimethyl-6-(N-methyl-p-toluidinomethyl)aniline (4b); (4b) + acid at 130 deg