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Synthesis of New Phosphahelicene Scaffolds and Development of Gold(I)-Catalyzed Enantioselective Allenene Cyclizations

机译:新型磷腈支架的合成和金(I)催化的对映选择性烯丙基环化的发展

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摘要

This paper reports on the development of an efficient synthesis of enantiopure phospha[6]helicenes through a [2+2+2] alkyne cyclotrimerization reaction. The corresponding gold complexes proved to be highly efficient both in terms of catalytic activity and enantioselectivity in [2+2] and [4+2] cycloaddition reactions. Furthermore, in the presence of an external nucleophile, such as water or alcohols, the tandem cyclization/addition reactions take place in high yields and excellent diastereo- and enantioselectivities.
机译:本文报道了通过[2 + 2 + 2]炔烃环三聚反应有效合成对映体磷[6]螺旋烯的进展。在[2 + 2]和[4 + 2]环加成反应中,相应的金络合物在催化活性和对映选择性方面均被证明是高效的。此外,在外部亲核试剂如水或醇的存在下,串联环化/加成反应以高收率和优异的非对映和对映选择性进行。

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