Synthesis of 3,3-Bis Chloromethyl Oxetane BCMO

The classical method of BCMO synthesis is by Sorensen and Campbell9)  

According to this procedure, pentaerithritol is treated with the mixture CH3COOH/ H20/HC1 at 160 °C in an autoclave and the product is refluxed with CH3OH. Crude trichloropentaerithritol is then refluxed with KOH in a CH30H/H20 mixture. 

The purity of the monomer can be determined by GC or cryometry 10). The refractive index can also be used to determine the purity. For polymerization grade monomer (purity over 99.8% according to GC) n20 = 1.48583-1.48586 n). 

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