A novel fluorous (S)-pyrrolidine-thiourea bifunctional organocatalyst is prepared. The catalyst shows good activity and enantioselectivity for direct α-chlorination of aldehydes using N-chlorosuccinimide (NCS) as the chlorine source. It can be recovered from the reaction mixture by fluorous solid-phase extraction with excellent purity for direct reuse.
制备了一种新型的
氟(S)-
吡咯烷-
硫脲双功能有机催化剂。该催化剂在使用 N-
氯代琥珀
酰亚胺 (
NCS) 作为
氯源直接 α-
氯化醛时表现出良好的活性和对映选择性。它可以通过
氟固相萃取从反应混合物中回收,纯度极佳,可直接重复使用。