在吡啶存在下,在乙腈中用N-氯苯并三唑进行芳基甲基和芳基异丙基亚砜的α-氯化反应遵循二级动力学。该反应受供电子基团的促进,并且受到明显的动力学同位素效应(K H / K D)。根据动力学数据,提出了两个亚砜系列的通用反应机理,其中涉及形成中间体的氯-氧磺酸盐,在速率确定步骤中,该盐在碱的作用下分解成α-氯亚砜。
在吡啶存在下,在乙腈中用N-氯苯并三唑进行芳基甲基和芳基异丙基亚砜的α-氯化反应遵循二级动力学。该反应受供电子基团的促进,并且受到明显的动力学同位素效应(K H / K D)。根据动力学数据,提出了两个亚砜系列的通用反应机理,其中涉及形成中间体的氯-氧磺酸盐,在速率确定步骤中,该盐在碱的作用下分解成α-氯亚砜。
Coenzyme NAD+ models can be applied in the photooxygenation of sulfides to sulfoxides as organocatalysts at room temperature. A series of sulfoxides are synthesized easily with this protocol and the possible mechanism is discussed. This procedure provides a reliable approach to the clean production of useful sulfoxides in synthetic chemistry.
The first desymmetrizations of prochiraldiarylsulfoxides 1 by an asymmetricsulfoxide–magnesiumexchange reaction are reported. The respective substrate (1), iPr2Mg, and the dilithium salt of (S)‐BINOL (which was prepared in situ) provided (S)‐configured aryl isopropyl sulfoxides 2 in up to 91 % yield and with up to 91 % ee. (S)‐BINOL was re‐isolable in 98 % yield.