ИСТИНА

One of the main monomers used for the preparation of high thermostable carboranylmethyl-containing oligomers and polymers of organosiloxane- and organosilazane structure is 1,2-bis[chloro-dimethylsilylmethyl]-o-carborane, which we obtained earlier with a yield up to 60% [1,2]. Presently we have developed a new, original and more efficient method for the preparation of 1,2-bis[chloro(dimethyl)silylmethyl]-o-carborane (I), as well as other, no less interesting and promising 1,2-bis[chloro(methyl)(organo) -silylmethyl]-o-carboranes (II-VIII) with phenyl, benzyl, tienyl, β-cyanethyl, ɣ-trifluoropropyl, vinyl and allyl radicals at silicon atom by the reaction of 1,2- (o-carborano)-4,6-bis[(methyl (organo) -silyl]-5-oxa-cycloheptanes with phosphorus trichloride with a yield up to 93%.