Platinum(0)-catalyzed diboration of allenes with bis(pinacolato)diboron
Platinum(0)-catalyzed diboration of allenes with bis(pinacolato)diboron
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DOI：
10.1016/s0040-4039(98)00199-3
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发表时间：
1998-04-16
影响因子：
1.8
通讯作者：
Miyaura, N
中科院分区：
文献类型：
--
作者：
Ishiyama, T;Kitano, T;Miyaura, N
在Pt（PPh 3）（4）存在下，在80 ℃或Pt（dbn）（2）/（c-Hex）（3）P存在下，以优异的产率进行双（频哪醇合）二硼[（Me 4C 2 O2）B-B（O2 C2Me 4）]与各种联烯的加成。单取代联烯的加成反应主要发生在内部双键上，而空间位阻较大的膦配体（c-Hex）（3）P与1，1-二取代联烯的加成反应则区域选择性地得到末端二硼化产物。(C)1998爱思唯尔科技有限公司版权所有。
Addition of bis(pinacolato)diboron [(Me4C2O2)B-B(O2C2Me4)] to various allenes was carried out in excellent yields in the presence of Pt(PPh3)(4) at 80 degrees C or Pt(dbn)(2)/(c-Hex)(3)P at 50 degrees C. The addition to internal double bond was predominant for monosubstituted allenes, whereas the terminal diboration products were regioselectively obtained when a sterically bulky phosphine ligand of (c-Hex)(3)P and 1,1-disubstituted allenes were used. (C) 1998 Elsevier Science Ltd. All rights reserved.