An Efficient and Convenient Synthesis of 4,5,6,7-Tetrahydrothieno[3,2-c]pyridines by a Modified Pictet-Spengler Reaction via a Formyliminium Ion Intermediate
摘要:
A synthesis of N-formyl-4,5,6,7-tetrahydrothieno[3,2-c]pyridines (5) was achieved in a highly efficient manner via trifluoroacetic acid catalyzed cyclization of formyliminium ion (4), which was produced by imination of 2-(2-thienyl)ethylamine (1) and a carbonyl compound (2) using titanium(IV) tetraisopropoxide followed by formylation with acetic-formic anhydride in a one-pot procedure. This modified Pictet-Spengler reaction provides a convenient method for preparing 4,5,6,7-tetahydrothieno[3,2-c]pyridines (6) possessing various substituents at C-4.
Modulation of Amide Bond Rotamers in 5-Acyl-6,7-dihydrothieno[3,2-<i>c</i>]pyridines
作者:Thomas Lanyon-Hogg、Markus Ritzefeld、Naoko Masumoto、Anthony I. Magee、Henry S. Rzepa、Edward W. Tate
DOI:10.1021/acs.joc.5b00205
日期:2015.5.1
of the lowest energy structures of 5-acyl-6,7-dihydrothieno[3,2-c]pyridine derivatives, that the amide E:Z equilibrium is affected by non-covalent interactions between the amide oxygen and adjacent aromatic protons. Structural predictions were used to design molecules that promote either the E- or Z-amide conformation, enabling preparation of compounds with a tailored conformational ratio, as proven
2-取代的N-酰基-哌啶是一种广泛而重要的结构基序,存在于大约500种当前可用的结构中,并存在于近30种药物活性化合物中。此类分子中酰基取代基的受限旋转会产生两种不同的化学环境。在这里,我们使用NMR研究和5-酰基-6,7-二氢噻吩并[3,2- c ]吡啶衍生物的最低能级结构的密度泛函理论模型证明,酰胺E:Z平衡受非共价影响酰胺氧与相邻的芳族质子之间的相互作用 结构预测用于设计促进E-或Z的分子-酰胺构象,使得能够制备具有特定构象比的化合物,这已通过NMR研究证明。对多种已公开的含N-酰基-哌啶的化合物的可用X射线数据的分析进一步表明,这些分子也聚集在两个观察到的构象中。这一发现强调了定向构象异构对小分子和较大的含酰胺分子结构的设计都具有重要意义。
Design, Synthesis, and Evaluation of Inhibitors of Hedgehog Acyltransferase
作者:Markus Ritzefeld、Leran Zhang、Zhangping Xiao、Sebastian A. Andrei、Olivia Boyd、Naoko Masumoto、Ursula R. Rodgers、Markus Artelsmair、Lea Sefer、Angela Hayes、Efthymios-Spyridon Gavriil、Florence I. Raynaud、Rosemary Burke、Julian Blagg、Henry S. Rzepa、Christian Siebold、Anthony I. Magee、Thomas Lanyon-Hogg、Edward W. Tate
DOI:10.1021/acs.jmedchem.3c01363
日期:2024.1.25
N-terminal palmitoylation, making the palmitoyl transferase Hedgehog acyltransferase (HHAT), a potential drug target and a series of 4,5,6,7-tetrahydrothieno[3,2-c]pyridines have been identified as HHAT inhibitors. Based on structural data, we designed and synthesized 37 new analogues which we profiled alongside 13 previously reported analogues in enzymatic and cellular assays. Our results show that a central
Glucose-6-phosphatase Catalytic Enzyme Inhibitors: Synthesis and In Vitro Evaluation of Novel 4,5,6,7-Tetrahydrothieno[3,2-c]- and -[2,3-c]pyridines
作者:Peter Madsen、Jane M. Lundbeck、Palle Jakobsen、Annemarie R. Varming、Niels Westergaard
DOI:10.1016/s0968-0896(00)00153-x
日期:2000.9
substituted 4,5,6,7-tetrahydrothieno[3,2-c]- and -[2,3-c]pyridines, is described. Optimisation of this series involved solution phase combinatorial synthesis and very potent compounds were prepared with IC50 values down to 140 nM. The structure activity relationship (SAR) of these compounds indicates that: a tetrahydrothieno[3,2-c]pyridine core ring system and the isomeric [2,3-c] system are equipotent and much
An Efficient and Convenient Synthesis of 4,5,6,7-Tetrahydrothieno[3,2-c]pyridines by a Modified Pictet-Spengler Reaction via a Formyliminium Ion Intermediate
A synthesis of N-formyl-4,5,6,7-tetrahydrothieno[3,2-c]pyridines (5) was achieved in a highly efficient manner via trifluoroacetic acid catalyzed cyclization of formyliminium ion (4), which was produced by imination of 2-(2-thienyl)ethylamine (1) and a carbonyl compound (2) using titanium(IV) tetraisopropoxide followed by formylation with acetic-formic anhydride in a one-pot procedure. This modified Pictet-Spengler reaction provides a convenient method for preparing 4,5,6,7-tetahydrothieno[3,2-c]pyridines (6) possessing various substituents at C-4.