2.4.6- tris-dimethylamino-l ,3,5-triazine

H NMR spectra of 1,3,5-triazines are otherwise straightforward. The chemical shifts of substituents appear as expected and are readily assigned from known published data. In this context aspects of H NMR applied to 1,3,5-triazines are discussed rather than listings of chemical shifts of substituents attached to 1,3,5-triazines. An investigation of the possible impurities in hexa-methylmelamine (2,4,6-tris(dimethylamino)-l,3,5-triazine, HMM) involved a H NMR analysis of HMM, cyanuric acid (1), and several potential impurities, namely 2-chloro-4,6-bis(dimethylamino)-... 

The Cotton-Mouton effect, magnetic anisotropy, and charge localization of 2,4,6-tris(dimethyl-amino)-1,3,5-triazine compared with 1,3,5-triazine have been examined <91JST(248)20l>. Dilute solution Kerr and Cotton-Mouton constants were measured for both 1,3,5-triazine and 2,4,6-tris(dimethylamino)-l,3,5-triazine. These constants were then used to derive experimental values for the optical-frequency polarizability anisotropies, and more importantly the magnetic anisotropies of... 

Hexamethylmelamine [2,4,6-tris(dimethylamino)-l,3,5-triazine] (24) forms complexes with a variety of aromatic compounds, and has been examined to investigate whether the planarity of the molecule in these complexes is... 

Tris(dimethylamino)-l,3,5-oxadiazinium chloride (223) was obtained when dimethyl-cyanamide and dimethylcarbamoyl chloride were heated together at 170°C for 20 min. When the salt (223) was heated with concentrated ammonia the l,3,5-triazin-2-one (224 R = H) was the product. The suggested mechanism follows the ANRORC pathway. The triazine product (224) can also be prepared more simply by hydrolysis of 2-chloro-4,6-bis(dimethylamino)-l,3,5-triazine by IM hydrochloric acid at boiling point for 3 h (Scheme 69) <85JCS(P1)1533> and 2-chloro-4,6-bis(dimethylamino)-l,3,5-triazine is available from cyanuric chloride and dimethylamine. The salt... 

Preparation of 90 was accomplished from the [4+2] cycloaddition of l-(dimethylamino)propyne 89 with 2,4,6-tris(ethoxycarbonyl)-l,3,5-triazine 87 (Equation 9) <1998JA53>. 

NMR studies of 4,6-bis- and 2,4,6-tris-(MA-dialkylamino)-l, 3,5-triazines show correlated rotations of the alkyl groups in the dialkylamino substituents. Unsymmetrical 2-chloro-, 2-alkoxy- and 2-aryloxy-4,6-bis-(di-/i-alkylamino)-l,3,5-triazines show two non-equivalent n-alkyl groups due to restricted rotation [95JCS(P2)785]. Calculations of the favoured conformations of 2-[A-(hydroxymethyl)-ALmethyl]-4,6-bis-dimethylamino-l,3,5-triazine using MNDO and PM3 methods have also been made [95JCS(P2)469]. 

The thermally induced rearrangements with loss of dimethylamine, of 2-alkylamino-2,4,6-tris(dimethylamino)-277-l,3,5-oxadiazines (55) to 4,6-bis(dimethylamino)-l,3,5-triazin-2(177)-ones (57) have been reported <85JCS(P1)1533>. 

An active co-catalyst system was proposed (83). The system is composed of 2,4,6-tris(diethanolamino)-s-triazine and l,3,5-tris(3-dimethylamino i opyl) hexahydro-s-triazine. This catalyst was used to jx-epare rigid carbodiimide foams from TDI without external heating. 

Abbreviations CDMT = 2-chloro-4,6-dimethoxy-l,3,5-triazine EDCI = l-ethyl-3-(3-dimethyla-minopropyl)carbodiimide BOP = benzotriazol-l-yloxy-tris-(dimethylamino)phosphonium hexa-fluorophosphate DIPEA = diisopropylethylamine DEPC = diethylphosphoryl cyanide CBM IT = l,l-carbonylbis(3-methylimidazolium triflate HOBt = 1-hydroxybenzotriazole hydrate HBPyU = 0-(benzotriazole-l-yl)-iV,Af,A,Af-bis(tetramethylene)uronium hexafluorophosphate. 

The full scope of the acid-catalyzed one-step conversion of N-/m-bu-tylmethanimine, generated in situ from l,3,5-tri-/ert-butylhexahydro-1,3,5-triazine, to symmetrical 3,5-disubstituted pyridines employing enamines has been detailed. The generation of 2,3,5,6-tetrasubstituted pyridines from the thermal reaction of enolizable ketones with hex-amethylphosphoric triamide has been proposed to proceed by in situ generation and subsequent [4 + 2] cycloaddition of N-methyl-l-aza-1,3-butadienes with intermediate dimethylamino enamines. ... 

Electronic stabilization allowed preparation of tris(dimethylamino)azete (2) (obtained by flash pyrolysis of the 1,2,3-triazine 1) and of the benzazete 4 (obtained by flash pyrolysis of the benzo-l,2,3-triazine 3). The Idnetically stabilized tri(tert-butyl)azete 6 was synthesized (Regitz, 1986 [7]) by thermal dediazoniation of 3-azido-l,2,3-tri((ert-butyl) cyclopropene (5) ... 

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