Diels-Alder Reaction of<i>o</i>-Carboryne with Fulvenes: Synthesis of Carboranonorbornadienes and Their Transformations
作者:Jie Zhang、Zaozao Qiu、Peng-Fei Xu、Zuowei Xie
DOI:10.1002/cplu.201402129
日期:2014.7
o‐Carboryne (1,2‐dehydro‐o‐carborane) generated in situ from the precursor 1‐iodo‐2‐lithio‐o‐carborane reacts with 6,6′‐diarylfulvenes to give a series of carboranonorbornadienes in moderate yields with excellent regioselectivity. The resultant [4+2] cycloadducts can be further derivatized, thus leading to the formation of a variety of highly functionalized carboranes. This study shows that such Diels–Alder
ø -Carboryne(1,2-脱氢ö -carborane)从所述前体中原位生成的1-碘-2- lithio- ö -carborane发生反应与6,6'- diarylfulvenes以得到中等产率具有优良的一系列carboranonorbornadienes的区域选择性。所得的[4 + 2]环加合物可以进一步衍生化,从而导致形成各种高度官能化的碳硼烷。这项研究表明,这种狄尔斯-阿尔德反应可作为一种方便的方法,用于制备可能在医学和材料科学中得到应用的新型多官能化的邻-碳环烷衍生物。