Br, I, OAc, OTf) complexes, providing tertiary propargylic trifluoromethyl alcohols in high yields and with excellent chemoselectivity from a broad range of aryl‐ and more challenging alkyl‐substituted trifluoromethyl ketones (TFMKs). DFT calculations were performed to rationalize the correlation between the yield of catalytic alkynylation and the sterics of N‐heterocycliccarbenes (NHCs), expressed
HYPOXIA INDUCIBLE FACTOR-1 PATHWAY INHIBITORS AND USES AS
ANTICANCER AND IMAGING AGENTS
申请人:EMORY UNIVERSITY
公开号:US20130164218A1
公开(公告)日:2013-06-27
This disclosure relates to Hypoxia Inducible Factor-1 pathway inhibitors and uses as anticancer and imaging agents. In certain embodiments, the disclosure contemplates compounds and pharmaceutical compositions disclosed herein.
AuCl3 catalyzed [3 + 2 + 1] cycloaddition: first use of aldehyde as a carbon monoxide-like one carbon synthon for triple C–C coupling
作者:Krishnanka S. Gayen、Dilip K. Maiti
DOI:10.1039/c3ra47093h
日期:——
A new [3 + 2 + 1] cycloaddition strategy is demonstrated using an aldehyde, an aldimine of a glycine ester and a terminal triple bond with AuCl3 catalyst. Aldehyde is exploited as the first alternative to the crucial partner CO for triple C–C coupled annulation for the synthesis of novel fused-tricyclic heterocycles.
Nucleophilic Addition of Amines to Ruthenium Carbenes:<i>ortho</i>-(Alkynyloxy)benzylamine Cyclizations towards 1,3-Benzoxazines
作者:Carlos González-Rodríguez、José Ramón Suárez、Jesús A. Varela、Carlos Saá
DOI:10.1002/anie.201410284
日期:2015.2.23
ortho‐(alkynyloxy)benzylamines to dihydro‐1,3‐benzoxazines is reported. The cyclization is thought to take place via the vinyl ruthenium carbene intermediates which are easily formed from [Cp*RuCl(cod)] and N2CHSiMe3. The mild reaction conditions and the efficiency of the procedure allow the easy preparation of a broad range of new 2‐vinyl‐2‐substituted 1,3‐benzoxazine derivatives. Rearrangement of
X=Y-ZH systems as potential 1,3-dipoles. Part 31. Generation of nitrones from oximes. Background and scope of the tandem 1,2-prototropy-intramolecular cycloaddition sequence.
作者:Ronald Grigg、Frances Heaney、Jasothara Markandu、Sivagnanasundram Surendrakumar、Thornton-Pett Mark、Warnock J. William
DOI:10.1016/s0040-4020(01)86441-3
日期:1991.1
and electronic factors that favour or disfavour such a sequence are discussed. Deuterium labelling studies with an aliphatic oxime rule out the involvement of an enehydroxylamine in the prototropic generation of the NH nitrone.