AbstractThis study presents an innovative method for synthesizing β‐amino carbonylated compounds, specifically 2‐[phenyl(phenylamino)methyl] cyclohexanone, achieving high conversions and diastereomeric ratios. Using trypsin or α‐chymotrypsin in both free and immobilized forms on titanate nanotubes (NtsTi), synthesized through alkaline hydrothermal methods, successful immobilization yields were attained. Notably, α‐chymotrypsin, when free, displayed a diastereoselective synthesis of the anti‐isomer with 97 % conversion and 16 : 84 (syn : anti) diastereomeric ratio, which slightly decreased upon immobilization on NtsTi. Trypsin, in its free form, exhibited diastereoselective recognition of the syn‐isomer, while immobilization on NtsTi (trypsin/NtsTi) led to an inversion of diastereomeric ratio. Both trypsin/NtsTi and α‐chymotrypsin/NtsTi demonstrated significant catalytic efficiency over five cycles. In conclusion, NtsTi serves as an effective support for trypsin and α‐chymotrypsin immobilization, presenting promising prospects for diastereoselective synthesis and potential industrial applications. Furthermore, it offers promising prospects for the diastereoselective synthesis of 2‐[phenyl(phenylamino)methyl] cyclohexanone through multicomponent Mannich reaction and future industrial application.
摘要 本研究提出了一种合成β-氨基羰基化合物(特别是 2-[苯基(苯基氨基)甲基]环己酮)的创新方法,实现了高转化率和非对映异构比。使用通过碱性水热法合成的钛酸纳米管(NtsTi)上的游离和固定形式的胰蛋白酶或α-糜蛋白酶,成功地获得了固定化产量。值得注意的是,α-糜蛋白酶在游离状态下可以非对映选择性地合成反异构体,转化率为 97%,非对映异构体比例为 16:84(同:反),固定在 NtsTi 上后,非对映异构体比例略有下降。游离状态下的胰蛋白酶对合成异构体具有非对映选择性识别,而固定在 NtsTi 上(胰蛋白酶/NtsTi)则导致非对映异构体比例倒置。在五个循环中,胰蛋白酶/NtsTi 和 α-糜蛋白酶/NtsTi 都表现出显著的催化效率。总之,NtsTi 是固定胰蛋白酶和 α-糜蛋白酶的有效支持物,为非对映选择性合成和潜在的工业应用提供了广阔的前景。此外,它还为通过多组分曼尼希反应非对映选择性合成 2-[苯基(苯基氨基)甲基]环己酮以及未来的工业应用提供了广阔的前景。