The reaction of diborane with boron trichloride in the presence of ethers—The chloroborane etherates
作者:Herbert C. Brown、P.A. Tierney
DOI:10.1016/0022-1902(59)80010-5
日期:1959.1
Diborane does not react to any significant extent with boron trichloride in the absence of ethers. In the presence of ethers (dimethyl ether, diethyl ether, diglyme, tetrahydrofuran and tetrahydropyran) reaction readily occurs at room temperatures to form chloroborane etherates, as indicated by the equations: B2H6 + BCl3 + 3R2O → 3H2ClB·OR2B2H6 + 4BCl3 + 6R2O → 6HCl2B·OR2 These chloroborane etherates
在不存在醚的情况下,乙硼烷不会与三氯化硼发生任何显着反应。在醚(二甲醚,二乙醚,二甘醇二甲醚,四氢呋喃和四氢吡喃)的存在下,在室温下容易发生反应,形成氯硼烷醚化物,如方程式所示:B 2 H 6 + BCl 3 + 3R 2 O→3H 2 ClB ·OR 2 B 2 H 6 + 4BCl 3 + 6R 2 O→6HCl 2 B·OR 2这些氯硼烷醚化物也可以根据以下反应由碱金属硼氢化物合成:MBH 4 + BCl3 + 2R 2 O→:2H 2 ClB·OR 2 + NaClMBH 4 + 3BCl 3 + 4R 2 O→:4HCl 2 B·OR 2 + NaCl它们的形成解释了乙硼烷处理碱金属硼氢化物时乙硼烷收率低。乙醚溶液中过量的三氯化硼。已经分离和表征了许多氯硼烷醚化物。它们与烯烃反应形成有机硼烷衍生物,并还原典型酮中的羰基,但不还原酯中的羰基。