Gold-Catalyzed [4+2]- and [3+3]-Annulations of Ynamides with 1-Yn-3-ols to Access Six-Membered Carbocycles and Oxacycles <i>via</i>
Three Distinct Cyclizations
作者:Sovan Sundar Giri、Rai-Shung Liu
DOI:10.1002/adsc.201700784
日期:2017.10.4
and 1‐yn‐3‐ols are described; the resulting carbo‐ and heterocycles were produced efficiently in one‐pot operations using a gold catalyst. The chemoselectivities of these annulations are controlled by variations of the substituents of the ynamides and the 1‐yn‐3‐ols. This reaction sequence involves initial alkoxylations of ynamides, followed by Claisen rearrangement of propargylic enolethers, and ends
[EN] SYNTHESIS OF SMALL MOLECULES INSPIRED BY PHOMOXANTHONE A<br/>[FR] SYNTHÈSE DE PETITES MOLÉCULES SUSCITÉES PAR PHOMOXANTHONE A
申请人:WORCESTER POLYTECH INST
公开号:WO2022036040A1
公开(公告)日:2022-02-17
Methods, compositions, and kits are provided for synthesizing bioactive chromane, the method including: constructing a tertiary ether stereocenter enantioselectively by catalyzed alkynylation of a substituted chromenone to obtain a chromanone; reducing alkyne and ketone in the chromanone to obtain a chroman; and converting ester to methyl group thereby obtaining chromane.
Atom‐economic Approach to the Synthesis of α‐(Hetero)aryl‐substituted Furan Derivatives from Biomass
作者:Leonid V. Romashov、Kirill S. Kozlov、Matvey K. Skorobogatko、Alexander Y. Kostyukovich、Valentine P. Ananikov
DOI:10.1002/asia.202101227
日期:2022.1.3
HMF core) and atom-economic cycloaddition process (to avoid waste on the aromatic ring formation step) was implemented to access (hetero)aryl-substituted furanderivatives. The present study points out a possible direction to increase the synthetic potential of biomass processing in the preparation of fine chemicals and suggests a plausible connection with molecular electronics area.