Škoch Karel, Chen Chaohuang, Daniliuc Constantin G, Kehr Gerald, Erker Gerhard
Organisch-Chemisches Institut, Westfälische Wilhelms-Universität Münster, Corrensstraβe 40, 48149 Münster, Germany.
Dalton Trans. 2022 May 17;51(19):7695-7704. doi: 10.1039/d2dt01193j.
The BH compounds IMes(Ar)BH(NTf) (Ar: CF or FpXyl) were converted to the IMes(Ar)BCH boraalkenes in a three step reaction sequence of B-methylation with methyllithium, hydride abstraction and deprotonation. The BCH boraalkenes reacted with elemental sulfur to give a thiaborirane product. They underwent [2+2] cycloaddition reactions with carbon dioxide or sulfur dioxide to give four-membered boron containing heterocycles. The boraalkenes added strongly Lewis acidic boranes at their CH carbon atoms. The corresponding HB(CF)/boraalkene adduct reduced carbon monoxide to a -OCH(CF)- moiety inside a five-membered heterocycle at the B-CH-B template. The boraalkenes reacted with the [(MeS)AuCl] reagent to form the corresponding (boraalkene)AuCl complexes.
BH化合物IMes(Ar)BH(NTf)（Ar：CF或FpXyl）通过与甲基锂进行硼甲基化、氢化物提取和去质子化的三步反应序列转化为IMes(Ar)BCH硼烯烃。BCH硼烯烃与元素硫反应生成硫硼杂环丙烷产物。它们与二氧化碳或二氧化硫进行[2+2]环加成反应，生成含硼的四元杂环。硼烯烃在其CH碳原子处强烈加成路易斯酸性硼烷。相应的HB(CF)/硼烯烃加合物在B-CH-B模板的五元杂环内将一氧化碳还原为-OCH(CF)-部分。硼烯烃与[(MeS)AuCl]试剂反应形成相应的(boraalkene)AuCl配合物。
