Methyl Ester Function: An Intramolecular Electrophilic Trap for the Isolation of Aryltellurenyl Hydroxide and Diorganotellurium Dihydroxide
作者:K. Selvakumar、Harkesh B. Singh、Nidhi Goel、Udai P. Singh
DOI:10.1021/om2001553
日期:2011.7.25
ellurinyl)isophthalate (7) and methyl 5-tert-butyl-3-oxo-3H-benzo[c][1,2]oxa tellurole-7-carboxylate (9). The telluroxide intermediate 7 readily undergoes a facile elimination reaction to give the elusive aryltellurenyl hydroxide, which is immediately trapped by the adjacent methyl ester functionality to give the cyclic tellurenate ester 9. Similarly, the hydrolysis of 7 with H2O affords the corresponding
已经研究了在碲氧化物消除反应中提出的形成芳基碲烯基氢氧化物类似物的方法。所述monotelluride二甲基-5-的反应叔丁基-2-(丁基碲)间苯二甲酸酯(6)用H 2 ö 2,得到相应的aryldiacyloxy- Ñ -butyltellurane(8)。在水分存在下6与氧气的反应导致形成8作为主要产物,同时还伴有痕量的5-叔丁基-2-间苯二甲酸二叔丁基(间苯二甲基)间苯二甲酸二甲酯(7)和5-叔丁基-3甲基-oxo-3 H-苯并[ c] [1,2]氧杂碲基-7-羧酸盐(9)。碲氧化物中间体7容易进行消除反应,得到难以捉摸的芳基碲烯基氢氧化物,该氢氧化物立即被相邻的甲酯官能团捕获,得到环状碲酸酯9。类似地,用H 2 O水解7得到相应的二羟基碲烷10,该二羟基碲烷10立即转化为碲烷8。化合物8和9均已通过单晶X射线晶体学研究进行了表征。