2024年4月8日 · Density functional theory calculations showed that owing the strong positive charge delocalization ability of DBU onium, DBU–based PILs exhibit high nucleophilicity, which is the key to their efficient catalytic performance in the one–pot reaction.

2 天之前 · 1，8-二氮杂二环十一碳-7-烯简称DBU，一种多功能的碱性试剂或催化剂，易溶于水、乙醇，具有很强的碱性，在异构、酯化、缩合、消除等反应中得到广泛的应用，且反应的条件温和、副反应少，反应选择性专一、产物转化率高，在化药领域有广泛的应用。 合成DBU的一般方法是己内酰胺与丙烯腈亲核加成生成N- (2-氰基乙基)己内酰胺，经催化加氢得N- (3-氨基丙基)己内酰胺，脱水环合得到DBU，在合成N- (3-氨基丙基)己内酰胺时，一般不使用溶剂，操作简单，但不 …

2024年5月2日 · Herein, 1,8‐diazabicyclo [5.4.0] undec–7–ene (DBU)–based poly (ionic liquid)s (PILs) were constructed for the one–pot synthesis of GC from CO2, Gly, and propylene oxide. Among them,...

1,8-二氮杂二环[5.4.0]十一碳-7-烯（DBU）化学式为C 9 H 16 N 2 ，是一个有位阻的脒类，具碱性。它在有机合成中用作催化剂、配体及非亲核性碱。 DBU可被从一种名为Niphates digitalis的海绵中分离出来，因此也被视为一种生物碱。

Density functional theory calculations showed that owing the strong positive charge delocalization ability of DBU onium, DBU‐based PILs exhibit high nucleophilicity, which is the key to their efficient catalytic performance in the one‐pot reaction.

Density functional theory calculations showed that owing the strong positive charge delocalization ability of DBU onium, DBU-based PILs exhibit high nucleophilicity, which is the key to their efficient catalytic performance in the one-pot reaction.

2025年1月31日 · DBU，即1，8-二氮杂二环-双环 (5，4，0)-7-十一烯，是一种具有强碱性的双环脒类化合物。 近年来，其独特的性质和应用价值逐渐受到化学研究者们的广泛关注。 DBU不仅被证实为一种可转换极性溶剂，还可作为高效的萃取剂用于油脂的萃取操作中，展现出较高的萃取率。 在分离过程中，通过通入CO2使DBU转变为离子液体，极性得以提高，从而促进油层与离子液体层的分离。 此外，DBU还具有结构独特、反应条件温和、合成步骤简化以及产物选择性专一 …

1,8-Diazabicyclo [5.4.0]undec-7-ene, or more commonly DBU, is a chemical compound and belongs to the class of amidine compounds. It is used in organic synthesis as a catalyst, a complexing ligand, and a non-nucleophilic base. [3] DBU can be synthesised in three steps from caprolactam and acrylonitrile.

Usually most effective catalysts described in the literature consist of powerful sources of nucleophile such as onium salt, of hydrogen bond donors and of tertiary amines used to combine epoxide...

2023年1月1日 · In addition to onium salts, other organic bases like DBU and TBD also worked well for COS/epoxide copolymerization in the presence of TEB. Three common epoxides (PO, CHO, and PGE) were respectively investigated for copolymerizations with COS.