The synthesis of one of the most potent dual inhibitors of the anti-apoptotic proteins Bcl-xL and Mcl-1 is reported. This analogue of a natural sesquiterpenoid dimer meiogynin A was elaborated by a convergent asymmetric synthesis with 36% yield in ten steps.
A novel constrained reduced-amide inhibitor of HIV-1 protease derived from the sequential incorporation of .gamma.-turn mimetics into a model substrate
作者:Kenneth A. Newlander、James F. Callahan、Michael L. Moore、Thaddeus A. Tomaszek、William F. Huffman
DOI:10.1021/jm00068a008
日期:1993.8
through P1' positions of substrate, was found to be an inhibitor with a Ki of 147 microM. Reduction of the amide bond in the C7 mimetic of IIIa resulted in a novel constrained reduced-amide mimetic VIa with a Ki of 430 nM. This corresponds to over a 300-fold improvement in inhibitory activity over the original C7 mimetic. The inhibitory activity of mimetic VIa was in addition found to be 44-fold better than
First synthesis and reactivity of phosphinite and phosphine bridge chelate dicarbonyl (η5-4-methoxycyclohexadienyl)iron complexes
作者:Nicolas Millot、Catherine Guillou、Claude Thal
DOI:10.1016/s0040-4020(97)00776-x
日期:1997.9
Chelated dicarbonyl (η4-4-methoxycyclohexadiene) iron complexes 6 and 15 which possess a phosphinite and a phosphine bridge respectively form a new class of iron complexes. Their cations 5 and 16 reacted regioselectively with nucleophiles in good yields. The observed regioselectivities are unusual for carbonyl (η5-4-methoxycyclohexadienyl) iron compounds.
Cationic 1-substituted-dicarbonyl(η5-4-methoxycyclohexadienyl)-(triphenylphosphine)iron complexes 10 from a new class of highly functionalised iron complexes which have never been described. They were obtained from neutral 1-substituted(η4-4-methoxy-1,3-cyclohexadiene)Fe(CO)2PPh3 iron complexes 9, prepared by ligand exchange reaction under improved experimental conditions. A quaternary carbon was formed