Various N-arylated sulfoximines have been synthesized in high yield by a direct approach which is based on a palladium-catalyzed cross-coupling strategy. Aryl bromides of variable substitution pattern were found to be the most effective coupling partners, whereas aryl iodides showed a nonpredictable behavior requiring lithium or silver salts as additives to ensure product formation in acceptable yields
已经通过基于
钯催化的交叉偶联策略的直接方法以高收率合成了各种N-芳基化亚砜基。发现可变取代模式的芳基
溴化物是最有效的偶联伙伴,而芳基
碘化物表现出不可预测的行为,需要
锂盐或
银盐作为添加剂以确保以可接受的产率形成产物。(S)-2-(2'-
溴苯基)-4-叔丁基
恶唑啉与对映体纯的(-)-(RS)-S-甲基-S-苯基亚磺
酰亚胺偶联,得到的产物产率高,为单一的非对映异构体,表明
钯催化的芳基化反应以立体定向方式进行。在所有情况下,与二
溴苯的反应均会生成单磺
酰亚胺基
芳烃,这表明引入磺
酰亚胺基基团会使
芳烃失活,