Pseudoesters and derivatives. XXIII Reaction of 3-bromo-5-methoxyfuran-2(5)-one with nucleophiles. Formation of cyclopropane derivatives
作者:Francisco Fariña(rk)、M.Carmen Maestro、M.Rosario Martín、M.Victoria Martín、Félix Sánchez、M.Luisa Soria
DOI:10.1016/s0040-4020(01)87341-5
日期:1986.1
The reactions of 3-bromo-5-methoxyfuran-2 (5 )-one () with nucleophiles in acetonitrile, in the presence of potassium carbonate and tetrabutylammonium bromide as a catalyst, are reported. The bromofuranone reacts, with several carbon and oxygen nucleophiles to give the cyclopropane bis-lactones , , or . When is reacted with diethylamine or propane-2-thiol in a 2:1 ratio, similar cyclopropane bis-lactones
据报道,在碳酸钾和溴化四丁基铵的存在下,3-溴-5-甲氧基呋喃-2(5 )-一()与亲核试剂在乙腈中的反应。的bromofuranone反应,与几个碳和氧亲核试剂,得到环丙烷双内酯,,或。当与二乙胺或丙烷-2-硫醇以2:1的比例反应时,分别形成类似的环丙烷双内酯或。基于涉及双迈克尔加成,然后闭环卤素内部亲核取代的机理来解释这种行为。