Acrylates, crotonate, and fumarates derivedfrom cinchona alkaloids were easily prepared. The highly re-facial selective additions of the dienophiles derivedfrom cinchonidine or quinine to some dienes were achieved in the presence of SnCl4. Similarly, si-facial selective additions were also achieved by the use of cinchonine instead of cinchonidine or quinine as a chiral auxiliary alcohol with equal