作者:Huey-San Melanie Siah、Morten Christian Hogsnes、Naseem Iqbal、Anne Fiksdahl
DOI:10.1016/j.tet.2015.12.080
日期:2016.2
To expand the understanding of the chemistry of propargyl acetals, their gold(I) catalysed cycloaddition reactions with alkynes have been investigated. We hereby report a novel tandem reaction that allows the construction of a new type of polysubstituted and highly functionalised bicyclic pentalene compounds, 2,6a-dimethoxy-3a-methyl-1,4,5-triphenyl-1,3a,4,6a-tetrahydropentalenes, with four stereogenic
为了扩大对炔丙基缩醛化学的认识,已经研究了它们的金(I)与炔烃催化的环加成反应。我们据此报告了一种新颖的串联反应,该串联反应允许构建新型的多取代和高度官能化的双环戊烯化合物2,6a-二甲氧基-3a-甲基-1,4,5-三苯基-1,3a,4,6a-四氢戊烯,具有四个立体异构中心。 从非对映异构产物的混合物中成功分离出纯度最高为51%的纯非对映异构体(总产率高达60%),并通过NMR光谱法进行了单独表征。对于这种金(I)催化的反应,提出了基于随后的[2 + 2]和[2 + 3]环加成反应形成这些新型串联产物的合理机制。