Thermolysis of Acylazo O-Trimethylsilyl Cyanohydrins: Azoalkanes Yielding Captodatively Substituted Radicals
摘要:
A new synthetic method has been developed for preparing azoalkanes bearing geminal ol-cyano and alpha-trimethylsiloxy groups. While the symmetrical compound 5 decomposes near room temperature to afford, almost entirely, the C-C dimers, the unsymmetrical azoalkane 3 requires heating to 75 degrees C. The thermolysis activation parameters of 3 and 5 can be rationalized on steric grounds without invoking captodative radical stabilization. A C-13 NMR product study of photolyzed 3 in the presence of TEMPO at 21 degrees C shows that the fate of caged [tert-butyl, 1-trimethylsiloxy-1-cyanoethyl(14)] radical pairs is disproportionation, 17%, cage recombination, 20%, and cage escape, 63%.
Hypervalent Iodine(III)-Promoted Phenyl Transfer Reaction from Phenyl Hydrazides to Nitriles
作者:Yan Yan、Zhiguo Zhang、Yameng Wan、Guisheng Zhang、Nana Ma、Qingfeng Liu
DOI:10.1021/acs.joc.7b01215
日期:2017.8.4
nitriles to N-phenyl amides has been achieved through a novel intermolecular phenyl transfer reaction from phenyl hydrazides and N-addition to nitriles in the presence of PIFA under mild and solvent-free conditions. This cross-coupling reaction includes the oxidative cleavage of sp2 C–N bonds of phenyl hydrazides to form a phenyl radical and the subsequent N-addition to cyanos to form new sp2 C–N bonds
The invention relates to compounds of formula I
having pharmacological activity towards the sigma receptor, to processes of preparation of such compounds, to pharmaceutical compositions comprising them, and to their use for the treatment and or prophylaxis of a disease in which the sigma receptor is involved.
The invention relates to compounds of formula I
having pharmacological activity towards the sigma receptor, to processes of preparation of such compounds, to pharmaceutical compositions comprising them, and to their use for the treatment and or prophylaxis of a disease in which the sigma receptor is involved.
The disclosed peptidomimetic macrocycles modulate the activity of MCL-1. Myeloid cell leukemia 1 (MCL-1) is a protein that inhibits cell death. Peptidomimetic macrocycles, pharmaceutical compositions, and methods disclosed herein can be used for the treatment of disease in which MCL-1 is over-expressed, such as cancer. In particular, MCL-1-modulating peptidomimetic macrocycles disclosed herein can be applied in the setting of resistance to BCL-2 family inhibitors, which is often engendered by MCL-1 over-expression or hyper-activation.
Peptidomimetic macrocycles and use thereof in regulating HIF1alpha
申请人:AILERON THERAPEUTICS, INC.
公开号:US10246491B2
公开(公告)日:2019-04-02
The present invention provides peptidomimetic macrocycles capable of regulating HIF1α and methods of using such macrocycles for the treatment of diseases.