介绍了一种金(I)催化的分子间缩甲醛[2 + 5]环加成反应,用于制备苯并稠合的N-杂环氮杂产物。在金(I)催化剂的存在下,很容易从容易获得的苯基炔丙基缩醛和苯甲二胺底物中一步制备许多苯并[ a ]氮杂-4-醇产物。炔丙基以及相应的醛和胺底物的直接一锅法也很成功。可以通过级联反应(包括亲核性苯扎二胺N)合理化获得苯并稠合氮杂物的反应-从炔丙基缩醛生成的高反应性苯基炔丙基-金(I)类胡萝卜素复合物上进行攻击。随后的脱脂步骤通过与醛亚胺部分的分子内Pictet-Spengler型反应,通过1,7-电环化促进环的闭合。
Gold(I)-Catalyzed Benz[<i>c</i>]azepin-4-ol Synthesis by Intermolecular [5 + 2] Cycloaddition
作者:Naseem Iqbal、Anne Fiksdahl
DOI:10.1021/jo401075n
日期:2013.8.16
N-heterocyclic azepine products is presented. A number of benz[c]azepin-4-ol products were readily prepared in one step from easily accessible phenylpropargyl acetals and benzaldimine substrates in the presence of a gold(I) catalyst. A direct one-pot procedure from the propargyl and the respective aldehyde and amine substrates was successful as well. The reaction to access the benzofused azepines could be
介绍了一种金(I)催化的分子间缩甲醛[2 + 5]环加成反应,用于制备苯并稠合的N-杂环氮杂产物。在金(I)催化剂的存在下,很容易从容易获得的苯基炔丙基缩醛和苯甲二胺底物中一步制备许多苯并[ a ]氮杂-4-醇产物。炔丙基以及相应的醛和胺底物的直接一锅法也很成功。可以通过级联反应(包括亲核性苯扎二胺N)合理化获得苯并稠合氮杂物的反应-从炔丙基缩醛生成的高反应性苯基炔丙基-金(I)类胡萝卜素复合物上进行攻击。随后的脱脂步骤通过与醛亚胺部分的分子内Pictet-Spengler型反应,通过1,7-电环化促进环的闭合。
Preparation and Catalytic Activity of Novel σ,π-Dual Gold(I) Acetylide Complexes
作者:Huey-San Melanie Siah、Anne Fiksdahl
DOI:10.1002/ejoc.201901623
日期:2020.1.23
Chiral bridged σ,π‐dual gold(I)‐acetylide complexes were synthesised, characterised, and their catalyticactivity was investigated. Dual gold(I)‐catalysed reactions of propargylic alcohol derivatives show different catalytic potential than the monogold or digold complexes. Mechanistic explanations are proposed for the differing regioselectivity or the similar or higher enantioselective outcome of some