Dilithiation of 2-(chloromethyl)-3-tosylpropene: Synthesis and reactivity of a new chlorinated allyl sulfone dianion
作者:Carmen Nájera、José M. Sansano
DOI:10.1016/s0040-4039(00)79038-1
日期:1992.10
Double lithiation of 2-(chloromethyl)-3-tosylpropene (4) with n-butyl-lithium at −90°C in the presence of DMPU leads to the dianion 5, which by reaction with deuterium oxide affords the corresponding 3,3-dideuteriated product 6. The alkylation reaction of dianion 5 gives mono and or 3,3-dialkylated products 11 and/or 7 or tosylated methylnecyclopropanes 8 depending on the reactivity of the alkylating
在DMPU存在下,于-90°C在正丁基锂的条件下,将2-(氯甲基)-3-甲苯磺酰基丙烯(4)与正丁基锂双重锂化生成二价阴离子5,该二价阴离子通过与氧化氘反应得到相应的3,3-药品合格6。二价阴离子5的烷基化反应取决于烷基化剂的反应性,并通过与作为亲电子试剂的醛或酮反应,将单和/或3,3-二烷基化产物11和/或7或甲苯磺酸化的甲基环环丙烷8甲苯磺酸化2,5-二氢呋喃9分别获得3-或甲苯磺酰基-亚烷基四氢呋喃10。