Suzuki–Miyaura reactions of the soluble guanylate cyclase inhibitor NS2028: a non-product specific route to C-8 substituted analogues
作者:Andrey A. Berezin、Panayiotis A. Koutentis
DOI:10.1016/j.tet.2011.04.003
日期:2011.6
Both soluble guanylate cyclase (sGC) inhibitors ODQ 1 and NS2028 2 are synthesized via improved protocols. In the former case treating 3,4-dihydroquinoxalin-2(1H)-one oxime 8, which can be prepared in two steps from 1,2-benzenediamine, with 1,1'-carbonyldiimidazole (CDI) gives the dihydro-ODQ 10 that in the presence of KMnO4 oxidises to give ODQ 1 in an overall yield of 46% starting from 1,2-benzenediamine. In the latter case, the synthesis affords NS2028 2 from 2-amino-4-bromophenol 3 in three steps with an overall yield of 85% and avoids the need for chromatography. Furthermore, Suzuki-Miyaura reaction conditions are described that enable the preparation of 8-aryl and 8-heteroaryl derivatives of NS2028 directly from NS2028 2. Finally, demethylation of the 8-(methoxyphenyl) substituted analogues afforded the 8-(hydroxyphenyl) derivatives 40-42. All new products are fully characterised. (C) 2011 Elsevier Ltd. All rights reserved.
Synthesis of Some New Biheterocycles by a One-Pot Suzuki-Miyaura Coupling Reaction
Halogenated indoles, benzofurans and flavones were subjected to a one-pot Suzuki-Miyaura coupling reaction to generate a series of new biheterocycles. The methodology may be readily adapted to the synthesis of a wide variety of substituted biheterocycles.
An effective conjugation strategy for designing short peptide-based HIV-1 fusion inhibitors
作者:Guodong Liang、Huixin Wang、Huihui Chong、Siqi Cheng、Xifeng Jiang、Yuxian He、Chao Wang、Keliang Liu
DOI:10.1039/c6ob01334a
日期:——
We provide an effective conjugation strategy for designing short peptide-based HIV-1 fusion inhibitors.