Intramolecular Diels–Alder reaction of α-fluoroacrylate derivatives promoted by novel bidentate aluminum Lewis acid
作者:Akio Saito、Hikaru Yanai、Wataru Sakamoto、Kosuke Takahashi、Takeo Taguchi
DOI:10.1016/j.jfluchem.2005.01.019
日期:2005.5
Intramolecular Diels–Alder (IMDA) reaction of α-fluoroacrylate derivatives 1a–e having 1,7,9-decatrienoate system is efficiently promoted by the novel bidentate Lewis acid A generated in situ by mixing 3,3′,5,5′-tetrabromo-1,1′-biphenyl-2,2′-diol (Br4BIPOL, 1 mol) and trimethylaluminum (2 mol). The IMDA reaction of α-fluoroacrylates proceeds via endo-boat transition state as in the case of the corresponding
通过混合3,3',5,5'-原位生成的新型双齿路易斯酸A,可以有效地促进具有1,7,9-十碳三烯酸酯体系的α-氟代丙烯酸酯衍生物1a - e的分子内Diels-Alder(IMDA)反应。四溴-1,1'-联苯-2,2'-二醇(Br 4 BIPOL,1摩尔)和三甲基铝(2摩尔)。与相应的非氟化丙烯酸酯一样,α-氟丙烯酸酯的IMDA反应通过内舟过渡态进行。