Synthesis of optically active methylmenthoxychlorosilanes and menthyl esters of methylchlorosilylpropionic and methylchlorosilylisobutyric acids

1. The reaction of methylhydrochlorosilanes with the menthyl esters of acrylic and methacrylic acid gave seven new optically active menthyl esters of chlorosilylpropionic and chlorosilylisobutyric acid. The mono- and dimenthoxychloromethylsilanes were isolated when methyltrichlorosilane was etherified withl-menthol. 2. All of the obtained compounds have a negative rotation and give smooth negative rotation dispersion curves, which are satisfactorily described by the Drude equation in the wavelength range 302–612 mμ.