作者:Gyula Hornák、Károly Lempert、Etelka Pjeczka、Gábor Tóth
DOI:10.1016/s0040-4020(01)96603-7
日期:1985.1
furnishes type 14 tetrahydroquinoxalines. 14a is obtained also by treating the N-(2-hydroxyethyl)-N-Me derivative 11 with the triphenylphosphine-diethyl azodicarboxylate (DEAD) reagent. In situ replacement of the chlorine atom of compound 9a by iodine in the absence of base as well as treatment of 1-(2-[N-(2-hydroxyethyl)-N-methylamino]phenyl)-1-methyl-3-phenylthiourea (18) with the triphenyl-phosphine-DEAD
虽然碱诱导的1-(2- [N-(烷基磺酰基和芳基磺酰基)-N-(2-氯乙基)氨基]苯基] -3-苯基硫脲1的闭环提供了相应的2型二氢-3,1,6-苯并噻二唑啉衍生物而不是同分异构的六氢-1,3,6-苯并三唑并硫酮(3)或四氢喹喔啉(4),通过碱引发相关N-(2-氯乙基)-N-Me衍生物9a - 9c,10a和10b的闭环提供14型四氢喹喔啉。通过处理N-(2-羟乙基)-N-Me衍生物11也获得14a用三苯基膦-偶氮二羧酸二乙酯(DEAD)试剂。在不存在碱的情况下用碘原位取代化合物9a的氯原子,以及处理1-(2- [N-(2-羟乙基)-N-甲基氨基]苯基)-1-甲基-3-苯基硫脲(18)用三苯基膦-DEAD试剂分别提供苯并咪唑衍生物16和22,可通过假设二氢和四氢-3,1,6-苯并噻二唑啉衍生物12a ·HI和20的中间体来合理化其形成。以及它们随后的环收缩。