Asymmetric Enamide–Imine Tautomerism in the Kinetic Resolution of Tertiary Alcohols
作者:Mengyao Tang、Huanchao Gu、Shunlong He、Subramani Rajkumar、Xiaoyu Yang
DOI:10.1002/anie.202106151
日期:2021.9.20
of racemic 2-arylsulfonamido tertiary allyl alcohols could be kinetically resolved with excellent kinetic resolution performances (with s-factor up to >200). This method is particularly effective for a series of 1,1-dialkyl substituted allyl alcohols, which produced chiral tertiary alcohols that would be difficult to access via other asymmetric methods. Facile and versatile transformations of the chiral
Phosphine-catalysed denitrative rearomatising (3 + 2) annulation of α,β-ynones and 3-nitroindoles
作者:Lona Dutta、Anwita Chattopadhyay、Nisha Yadav、S. S. V. Ramasastry
DOI:10.1039/d2ob02180c
日期:——
We describe a metal-free strategy to access various α-arylidene cyclopenta[b]indoles via phosphine-catalysed (3 + 2) annulation of α,β-ynones and 3-nitroindoles. For the first time, the rearomatisation of the indole nucleus was observed in such an annulative transformation. The method was extended to the synthesis of an antimalarial natural product, bruceolline E.