The invention relates to a method for preparing a sulphoxide compound of formula either as a single enantiomer or in an enantiomerically enriched form, comprising the steps of:a) contacting a pro-chiral sulphide of formula with a metal chiral complex, a base and an oxidizing agent in an organic solvent; and optionallyb) isolating the obtained sulphoxide of formula. In an optional embodiment, wagers may be received prior to commencement of the game andor at the intermediate point and resolved at the end of the game. Accordingly, an image is displayed on the standby screen even in a blank period that a TV image cannot be displayed well because of a preparation for displaying a TV image right after the transition to the standby condition, thereby promoting utilization of a TV broadcasting through the mobile terminal. As the player plays music, inputting potentially unacceptable notes, the inputted notes will be converted to musically acceptable notes with reference to the currently presented chord in the chord progression. The nanocapsules produced by the methods have been shown to have long-term stability, high cell penetration capability, low toxicity and efficient protease-modulated specific degradability without affecting cargo protein function.