trans -Aconitic acid-based hetero -Diels-Alder reaction in the synthesis of thiopyrano[2,3- d ][1,3]thiazole derivatives
作者:Nataliya Zelisko、Olexandr Karpenko、Volodymyr Muzychenko、Andrzej Gzella、Philippe Grellier、Roman Lesyk
DOI:10.1016/j.tetlet.2017.03.062
日期:2017.5
hetero-Diels-Alder reaction of 5-arylideneisorhodanines with trans-aconitic acid proceeds as a regio- and diastereoselective process with spontaneous decarboxylation of the [4+2]-adduct to furnish thiopyrano[2,3-d][1,3]thiazole (2) and chromeno[4′,3′:4,5]thiopyrano[2,3-d]thiazole (3) derivatives analogously to the use of itaconic acid as a dienophile. Conversely, the one-pot, three-component reaction of 5-ar
5-芳基异二十二碳四烯酸与反式-乌头酸的异-狄尔斯-阿尔德反应是区域和非对映选择性过程,其中[4 + 2]加合物自发脱羧生成噻喃并[2,3- d ] [1,3类似于使用衣康酸作为亲双烯体,]噻唑(2)和苯并[4',3':4,5]巯基吡喃并[2,3- d ]噻唑(3)衍生物。相反,5-arylideneisorhodanines,一锅,三组分反应反式-aconitic酸和苯胺进行时没有脱羧,从而导致新的相对- (5' - [R,6' - [R,7' - [R)-5'-羧基7'-芳基的1-芳基-3',7'-二氢-2 ħ,2 ' ħ,5 ħ -螺[吡咯烷3,6'噻喃并[2,3- d ]噻唑] -2,2',5-三酮4。有趣的是,使用的反式导致区域选择性相反-aconitic羧酸三甲酯,得到的rel - (5 - [R,6小号,7小号)-5- methyloxycarbonylmethyl -2-氧代-7-芳基-3