An expedient approach to allenes and polycyclic structures using propargyl radicals
摘要:
A general approach to the synthesis of allenes and polycyclic structures has been developed, based on the addition of a xanthate to an enyne followed by ring-closure of the allenyl radical on to an internal olefin. (c) 2005 Elsevier Ltd. All rights reserved.
Transition from π Radicals to σ Radicals: Substituent-Tuned Cyclization of Hydrazonyl Radicals
作者:Xiao-Yong Duan、Neng-Neng Zhou、Ran Fang、Xiu-Long Yang、Wei Yu、Bing Han
DOI:10.1002/anie.201309918
日期:2014.3.17
Hydrazonylradicals are known for their π‐electronic structures; however, their σ‐electronic structures have not been reported as yet. Herein, we show that readily accessible β,γ‐ and γ,δ‐unsaturated N‐trichloroacetyl and N‐trifluoroacetyl hydrazones can be conveniently converted into hydrazonylσradicals, which subsequently undergo 5‐exo‐trig radicalcyclization at the N1 or N2 atom to form pyrazolines
Iminoxyl Radical-Promoted Dichotomous Cyclizations: Efficient Oxyoximation and Aminooximation of Alkenes
作者:Xie-Xue Peng、Yun-Jing Deng、Xiu-Long Yang、Lin Zhang、Wei Yu、Bing Han
DOI:10.1021/ol502258n
日期:2014.9.5
A novel iminoxyl radical-involved metal-free approach to vicinal oxyoximation and aminooximation of unactivated alkenes is developed. This method utilizes the dichotomous reactivity of the iminoxyl radical to furnish a general difunctionalization on alkenes using simple tert-butyl nitrite (TBN) as the iminoxyl radical initiator as well the carbon radical trap. By using this protocol, oxime featured 4,5-dihydroisoxazoles and cyclic nitrones were facilely prepared from beta,gamma- and gamma,delta-unsaturated ketoximes, respectively.
SYNTHESIS OF DELTA 12-PGJ3 AND RELATED COMPOUNDS
申请人:WILLIAM MARSH RICE UNIVERSITY
公开号:US20160318862A1
公开(公告)日:2016-11-03
In one aspect, the present invention provides novel derivatives of Δ
12
-PGJ
3
and modular synthetic pathways to obtaining Δ
12
-PGJ
3
and derivatives thereof. In some aspects, the present derivatives of Δ
12
-PGJ
3
are useful as chemotherapeutic agents. The present disclosure also describes compositions of these derivatives as well as methods of use of the derivatives thereof.