When the chemical reaction for multifunctional compound is carried out selectively, reaction conditions should be considered based on synthetic strategy. The most popular method is using "protective group" that is employed for temporarily blocked for other reactive sites. Several types of protective groups have been developed. A protective group must satisfy a number of requirements, such as reacting selectively in excellent yield, easy to remove protected group in good yield by readily available reagents, easy purification, and so on. Since there are no protective groups for effective of all things considered, a large number of mutually complementary protective groups are necessary.
FUJIFILM Wako proposes several types of protective groups in hereafter