Gold(I)-Catalyzed Regioselective Cyclization to Access Cyclopropane-Fused Tetrahydrobenzochromenes
作者:Perla Bharath Kumar、Chittala Emmaniel Raju、Patel Hinal Chandubhai、Balasubramanian Sridhar、Galla V. Karunakar
DOI:10.1021/acs.orglett.2c02564
日期:2022.9.23
Gold(I)-catalyzedefficient synthetic transformation was achieved to access the tetrahydrobenzo[h]cyclopropa[c]chromenes from allyl-substituted 1,6-diynes. Cyclopropane-fused tetrahydrobenzochromenes were obtained regioselectively in ≤92% yields. In this atom-economic organic transformation, three new C–C bonds were formed sequentially in one pot.
实现了金(I)催化的高效合成转化,以从烯丙基取代的 1,6-二炔中获得四氢苯并[ h ]环丙[ c ]色烯。以≤92% 的产率区域选择性地获得了环丙烷稠合的四氢苯并色烯。在这种原子经济有机转化中,三个新的 C-C 键在一锅中依次形成。
Gold(I)‐Catalyzed Regioselective Synthesis of Indenylidene Derivatives via 1,5‐Acryl Migration
A novel gold (I)-catalyzedsynthetic strategy has been achieved for an efficientconstruction of indenylidene derivatives from substituted 1,6-diynes. This reaction describes the unique reactivity of gold catalysis in facilitating the intramolecular [3,3]-sigmatropic rearrangement, 5-exo dig cyclization followed by 1,5-migration of acryl group, resulting in the formation of substituted indenylidenes
A novel and flexible sequentially cascade iodocyclization for the synthesis of highly substituted 1,3-diiodinated naphthalene derivatives in up to 99% yield under mild conditions is reported. The dihalogenated moiety can be readily introduced into the naphthalenes in a position that is usually not easily functionalized.