The Influence of Condensed Cycle on Regiochemistry of Electrophilic Heterocyclization of 3-Alkenyl-2-Thioxopyrimidin-4-One by<i>p</i>-Alkoxyphenyltellurium Trichloride
作者:Mykola Kut、Mikhajlo Onysko、Vasil Lendel
DOI:10.1002/jhet.3114
日期:2018.4
5‐alkenyl‐1‐methyl‐6‐thioxopyrazolo[3,4‐d]pyrimidin‐4‐ones and 3‐alkenyl‐2‐thioxoquinazoline‐4‐ones under the action of p‐alkoxyphenyltellurium trichloride leads to annulation of thiazoline cycle with formation of 7‐[(p‐alkoxyphenyl)telluromethyl]‐1‐methyl‐6,7‐dihydropyrazolo[3,4‐d][1,3]thiazolo[3,2‐a]pyrimidin‐4(1H)‐ones hydrochlorides and 2‐(p‐alkoxyphenyl)dichlorotelluromethyl‐2,3‐dihydro‐5H‐[1,3]thiazolo[2
p-烷氧基苯基碲三氯化物作用下的5-烯基-1-甲基-6-硫代吡唑并[3,4- d ]嘧啶-4-酮和3-烯基-2-硫代喹唑啉-4-酮的亲电杂环化作用噻唑啉循环,形成7-[(对烷氧基苯基)碲甲基] -1-甲基-6,7-二氢吡唑并[3,4- d ] [1,3]噻唑并[3,2 - a ]嘧啶-4(1 ħ) -酮盐酸盐和2-(p -烷氧基苯基)dichlorotelluromethyl -2,3-二氢- 5 ħ - [1,3]噻唑并[2,3- b]喹唑啉-5-酮盐酸盐。通过过量亚硫酸钠的作用来还原盐导致形成芳基杂芳基碲化物。