1,3-Bis[(di)alkylamino]-pentamethyldisilazane

1,3-Bis(alkylamino)pentamethyldisilazanes, which are important for the synthesis of special cyclotrisilazanes from different building units, could be prepared by reaction of 1,3-dichloropentamethyldisilazanes with alkylamines (equ. 5), or by transamination of 1,3-bis(methylamino)pentamethyldisilazane, which is easily obtained from dimethyldichlorosilane and methylamine, with higher primary amines (equ. 3). The properties of the compounds II–XI, prepared for the first time, may be taken from Table 1.