How is 1,3,5-Trimethyl-1,3,5-triazinane (CAS: 108-74-7) typically synthesized?

1,3,5-Trimethyl-1,3,5-triazinane is typically synthesized through the reaction of methyl isocyanate with methyl isocyanide. The process involves the condensation of two equivalents of methyl isocyanate with a catalyst such as sodium ethoxide in a suitable solvent like ethanol. The yield is usually around 70-80%, and the reaction is carried out at a temperature of about 50-80°C. The product is purified by recrystallization to remove impurities.