CYANIC ACID, PHENYL ESTER

Chromium trioxide, 60, 21 Clemmensen reaction, 60, 111 Copper chloride (CuCl) [7758-89-6], 61, 122 Crotonic acid, ethyl ester, ( )-, 61, 85 18-Crown-6-potassium cyanide complex, 60,129 Crum Brown-Walker reaction, 60, 4 Cuprous chloride, 60, 42, 121 61, 122 CYANIC ACID, PHENYL ESTER [1122-85-6], 61, 35... 

Figure 11 Thermal cyclotrimerization of cyanic acid phenyl ester 83 yielding 2,4, 6-triphenoxy-l,3,5-triazine 84 and chemical formulae of commercial cyanate esters 85-89 used as base resins to produce heat-resistant adhesives and moulding materials.

CYANIC ACID ESTERS FROM PHENOLS PHENYL CYANATE... 

Cyanic acid esters Isocyanates Phenyl isocyanate... 

MeNHj CO, Me NCONMe Cyanic acid esters, PhOCN, p-Tolyl cyanate, 2,4-Di-methylphenyl -Isocyanates Phenyl isocyanate 2-Ethoxy-N-ethoxy-carbonyl-1,2-dihydro-quinoline Carbodiimides Diisopropyl-carbo-diimide, Dicyclohexyl-, Di-p-tolyl-Polyhexamethylene-carbodiimide N-Methyl-N,N -dicyclo-hexylcarbodiimidium iodide... 

CH NHhCO, (CH,) CON(CHs) Cyanic acid esters, C HfiCN, 2,4-Di-methylphenyl cyanate Isocyanates Phenyl isocyanate... 

C0(NH2)2, (CHsNH)fiO, (CHs)2NC0N(CH,), Cyanic acid esters Isocyanates Phenyl isocyanate... 

Reaction with cyanic esters 732 Carbon disulfide (2.28 g, 30 mmoles) in ether (5 ml) is dropped into a solution of the amine (30 mmoles) and triethylamine (3.03 g, 30 mmoles) in ether (20 ml) which is stirred and cooled in ice-water. The mixture is then left at room temperature for 1 h (or 24 h for aromatic amines), treated with phenyl cyanate (3.57 g, 30 mmoles), and diluted with ether (5 ml). The clear solution that results is extracted with dilute hydrochloric acid, with sodium hydrogen carbonate solution, and with water, concentrated, filtered from the precipitated phenyl thiocarbamate, and fractionated. Yields are about 60%. 

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