酯键作为通用接头由于其在切割后通过静电排斥而有效释放基因,因此最近已在基因传递系统中得到应用。但是,酯键不稳定且难以在细胞中裂解。这项工作报告了一种方法,其中将仲胺引入酯键的β位以生成氢键环化(HBC)结构,该结构可使酯键水解超快。一系列包含可被H 2 O 2活化的超敏酯的分子合成后发现,能够形成HBC结构的化合物在水和磷酸盐缓冲盐溶液中均在5小时内完全酯水解,这比报道的其他方法快几倍。然后,构建了一系列两亲性聚(酰胺基胺)树枝状大分子,其中包括用于基因传递的超灵敏酯基;人们发现,他们可以有效地释放基因h的相当低的浓度下2 Ò 2(<200μ米在Hela细胞中具有高安全性)和传输它们到细胞核中在2小时内。他们的基因转染效率高于PEI 25k。结果表明,氢键诱导的超敏酯可以有效地用于构建基因传递系统。
Direct Conversion of CO 2 in Lime Kiln Waste Gas Catalyzed by a Copper‐Based N ‐heterocyclic Carbene Porous Polymer
作者:Zhi-Xiu Rao、Pei-Bo Chen、Jin Xu、Qing Wang、Hai-Tao Tang、Ying Liang、Ying-Ming Pan
DOI:10.1002/cssc.202300170
日期:——
copper-based N-heterocyclic carbene porous polymer (Cu@NHC-1) with triple synergistic catalytic effect on the conversion of CO2 via carboxylative cyclization was successfully fabricated to convert CO2 in limekiln waste gas into value-added oxazolidinones, providing a prospect for the direct utilization of low concentration CO2 in industrial waste gas.
Tetrahydroisoquinoline compounds, process for preparing them and pharmaceutical compositions containing them
申请人:Tanabe Seiyaku Co., Ltd.
公开号:EP0018549A2
公开(公告)日:1980-11-12
A tetrahydroisoquinoline compound of the formula:
wherein R1 is alkyl of one to six carbon atoms, cycloalkyl of threeto six carbon atoms allyl or propargyl, R2 is hydrogen or alkyl of one to six carbon atoms, and R3 is hydrogen, alkyl of one to six carbon atoms or benzyl. Methods for preparing the compound (I) are disclosed. The compound (I) and a pharmaceutically acceptable salt thereof are useful as a diagnostic or therapeutic agent for angiotensin-related hypertension.
that can make the ester bond hydrolysis ultrafast. A series of molecules comprising ultrasensitive esters that can be activated by H2O2 were synthesized, and it was found that those able to form an HBC structure showed complete esterhydrolysis within 5 h in both water and phosphate‐buffered saline solution, which was several times faster than other methods reported. Then, a series of amphiphilic poly(amidoamine)
酯键作为通用接头由于其在切割后通过静电排斥而有效释放基因,因此最近已在基因传递系统中得到应用。但是,酯键不稳定且难以在细胞中裂解。这项工作报告了一种方法,其中将仲胺引入酯键的β位以生成氢键环化(HBC)结构,该结构可使酯键水解超快。一系列包含可被H 2 O 2活化的超敏酯的分子合成后发现,能够形成HBC结构的化合物在水和磷酸盐缓冲盐溶液中均在5小时内完全酯水解,这比报道的其他方法快几倍。然后,构建了一系列两亲性聚(酰胺基胺)树枝状大分子,其中包括用于基因传递的超灵敏酯基;人们发现,他们可以有效地释放基因h的相当低的浓度下2 Ò 2(<200μ米在Hela细胞中具有高安全性)和传输它们到细胞核中在2小时内。他们的基因转染效率高于PEI 25k。结果表明,氢键诱导的超敏酯可以有效地用于构建基因传递系统。
Aza-Michael Mono-addition Using Acidic Alumina under Solventless Conditions
作者:Giovanna Bosica、Roderick Abdilla
DOI:10.3390/molecules21060815
日期:——
Aza-Michael reactions between primary aliphatic and aromatic amines and various Michael acceptors have been performed under environmentally-friendly solventless conditions using acidic alumina as a heterogeneous catalyst to selectively obtain the corresponding mono-adducts in high yields. Ethylacrylate was the main acceptor used, although others such as acrylonitrile, methyl acrylate and acrylamide