The protective group having the following formula (I): Ar--L-- (I) wherein Ar represents a substantially planar, fused ring system containing at least 4 aromatic rings, and L represents a group containing at least one carbon atom which is capable of bonding to a group to be protected.
具有以下式子(I)的保护基团:Ar--L--(I)其中Ar代表一个含有至少四个芳香环的基本平面融合环系统,L代表一个含有至少一个碳原子的基团,该碳原子能够与待保护的基团形成
化学键。