Rhodium-catalyzed Dehydroborylation of Styrenes with Naphthalene-1,8-diaminatoborane [(dan)BH]: New Synthesis of Masked β-Borylstyrenes as New Phenylene–Vinylene Cross-coupling Modules
作者:Noriyuki Iwadate、Michinori Suginome
DOI:10.1246/cl.2010.558
日期:2010.6.5
Styrene derivatives underwent dehydroborylation with naphthalene-1,8-diaminatoborane [(dan)BH] in the presence of a cationic rhodium complex, giving β-borylstyrene derivatives in good yields. Thus prepared β-borylstyrenes bearing a chlorine or B(pin) group on their aromatic rings were utilized for the synthesis of highly conjugated molecules through stepwise cross-coupling, taking advantage of the dan group as an effective protective group for a boronyl group.
苯乙烯衍生物在阳离子铑配合物存在下,与萘-1,8-二氨基硼烷[(dan)BH]进行脱氢硼化反应,以良好的产率得到了β-硼烷基苯乙烯衍生物。通过逐步交叉耦合反应,利用dan基团作为硼基的有效保护基,制备的具有氯或B(pin)基团的β-硼烷基苯乙烯能够用于合成高度共轭的分子。