The formal synthesis of isofebrifugine using stereoselective intramolecular Michael addition
摘要:
The formal synthesis of isofebrifugine, a bioactive alkaloid, was achieved via a stereoselective intramolecular Michael addition reaction from D-mannitol. (C) 2008 Elsevier Ltd. All rights reserved.
The formal synthesis of isofebrifugine using stereoselective intramolecular Michael addition
摘要:
The formal synthesis of isofebrifugine, a bioactive alkaloid, was achieved via a stereoselective intramolecular Michael addition reaction from D-mannitol. (C) 2008 Elsevier Ltd. All rights reserved.
Intercalating Nucleic Acids Containing Insertions of Naphthalimide
作者:Michael C. Wamberg、Krzysztof Walczak、Lars Andersen、Allam A. Hassan、Erik B. Pedersen
DOI:10.1002/hlca.200690177
日期:2006.9
In a study of linker-length dependence, we evaluated naphthalimide (= 1H-benzo[de]isoquinoline-1,3(2H)-dione) and 4-bromonaphthalimide as intercalating nucleic acids. We used a vicinal dihydroxy system when incorporating the six different naphthalimide monomers into DNA, and found the minimum linker-length to be five C-atoms. With this length of the linker, naphthalimide was discriminating between
在对接头长度依赖性的研究中,我们评估了萘二甲酰亚胺(= 1 H-苯并[ de ]异喹啉-1,3(2 H)-二酮)和4-溴萘二甲酰亚胺作为插入核酸。当将六种不同的萘二甲酰亚胺单体掺入DNA时,我们使用了邻位二羟基系统,发现最小的连接子长度为5个C原子。有了这样长的接头,萘二甲酰亚胺可以区分DNA和RNA-稳定DNA,同时稳定RNA。此外,萘二甲酰亚胺通过与窄至1.4°范围内的四个天然碱基杂交而显示出通用的碱基特征。当与compared比较时,具有相同连接子长度的萘二甲酰亚胺与DNA杂交时,其热解链明显更高。
Intercalating nucleic acids (INAs) containing insertions of 6H-indolo[2,3-b]quinoxaline
作者:Michael C. Wamberg、Allam A. Hassan、Andrew D. Bond、Erik B. Pedersen
DOI:10.1016/j.tet.2006.09.017
日期:2006.11
6H-Indolo[2,3-b]quinoxaline was studied as a covalently bound heteroaromatic intercalator. Six monomers were synthesized and incorporated into DNA oligonucleotides. Through a study of linker length dependence it was concluded that the linker between the oligo and the intercalator must consist of at least five C atoms in order to stabilize a DNA duplex. An intercalator with a 2 '-deoxy-D-riboside linker to the oligo could also stabilize a DNA/RNA duplex, while (S)-4-(6-methylindolo[2,3-b]quinoxalin-3-ylmethoxy)-butane-1,2-diol was able to stabilize both DNA/DNA, DNA/RNA and a DNA/LNA duplex. Mismatch studies revealed a huge sensitivity to the C-C mismatch at the 5'-site of the intercalator. (c) 2006 Elsevier Ltd. All rights reserved.