Synthesis of σ Receptor Ligands with a Spirocyclic System Connected with a Tetrahydroisoquinoline Moiety via Different Linkers
作者:Melanie Bergkemper、Dirk Schepmann、Bernhard Wünsch
DOI:10.1002/cmdc.202000861
日期:2021.4.8
2‐benzopyran and 2‐benzofuran scaffolds were connected to the 6,7‐dimethoxy‐1,2,3,4‐tetrahydroisoquinoline moiety by variable linkers. In addition to flexible alkyl chains, linkers containing an amide as functional group were synthesized. The 2‐benzopyran and 2‐benzofuran scaffold of the spirocyclic compounds were synthesized from 2‐bromobenzaldehyde. The amide linkers were constructed by acylation
为了开发新的σ2受体配体,具有 2-苯并吡喃和 2-苯并呋喃支架的螺环哌啶或环己胺通过可变连接体连接到 6,7-二甲氧基-1,2,3,4-四氢异喹啉部分。除了柔性烷基链之外,还合成了含有酰胺作为官能团的连接体。螺环化合物的2-苯并吡喃和2-苯并呋喃支架是由2-溴苯甲醛合成的。通过氯乙酰氯酰化胺并随后进行亲核取代构建酰胺连接体,通过相应酰胺的LiAlH 4还原获得烷基连接体。对于σ 2受体配体的开发,螺环2-苯并吡喃支架比缩环2-苯并呋喃系统更有利。带有烷基链作为连接基的化合物通常比含有酰胺作为官能团的酰基连接基表现出更高的σ亲和力。发现顺式构型环己胺比反式构型衍生物具有更高的 σ 1亲和力。对于通过乙烯间隔基连接到四氢异喹啉系统的顺式螺[[2]苯并吡喃-1,1'-环己烷]-4'-胺,观察到最高的 σ 2亲和力( cis ‐ 31 , K (σ 2 )= 200 nM;记录了具有 CH 2 C=O